<PAGE>

                                                                     EXHIBIT 1.1

                               2,580,000 Shares*

                              CANDELA CORPORATION

                                  Common Stock

                             UNDERWRITING AGREEMENT
                             ----------------------

                                                                   July __, 1999


Needham & Company, Inc.
Tucker Anthony Cleary Gull
  As Representatives of the several Underwriters
  c/o Needham & Company, Inc.
  445 Park Avenue
  New York, New York 10022

Ladies and Gentlemen:

    Candela Corporation, a Delaware corporation (the "Company"), proposes to
                                                      -------
issue and sell 1,499,854 shares (the "Company Firm Shares") of the Company's
                                      -------------------
Common Stock, $0.01 par value per share (the "Common Stock"), and the
                                              ------------
stockholders of the Company named in Schedule II hereto (collectively, the "Firm
                                                                            ----
Selling Stockholders") propose to sell an aggregate of 1,080,146 (the "Selling
--------------------                                                   -------
Stockholder Firm Shares") of Common Stock, in each case to you and to the
-----------------------
several other Underwriters named in Schedule I hereto (collectively, the
"Underwriters"), for whom you are acting as representatives (the
-------------
"Representatives").  The Company and the stockholders of the Company named in
----------------
Schedule III hereto (the "Option Selling Stockholders," and collectively with
                          ---------------------------
the Firm Selling Stockholders, the "Selling Stockholders") have also agreed to
                                    --------------------
grant to you and the other Underwriters an option (the "Option") to purchase up
                                                        ------
to an additional 327,000 shares (the "Company Option Shares") and 60,000 shares
                                      --------------------
(the "Selling Stockholder Option Shares") of Common Stock, respectively, on the
      ---------------------------------
terms and for the purposes set forth in Section 1(b).  The Company Option Shares
and the Selling Stockholder Option Shares are referred to collectively herein as
the "Option Shares," and the Firm Shares and the Option Shares are referred to
     -------------
collectively herein as the "Shares."
                            ------

    The Company and each of the Selling Stockholders confirm as follows their
respective agreements with the Representatives and the several other
Underwriters.

---------------------------
* Plus an option to purchase up to an additional 387,000 shares to cover over-
  allotments.
<PAGE>

     1.  Agreement to Sell and Purchase.

     (a) On the basis of the representations, warranties and agreements of the
Company and the Selling Stockholders herein contained and subject to all the
terms and conditions of this Agreement, (i) the Company agrees to issue and sell
the Firm Shares to the several Underwriters, (ii) each Firm Selling Stockholder,
severally and not jointly, agrees to sell to the several Underwriters the
respective number of Selling Stockholder Firm Shares set forth opposite that
Firm Selling Stockholder's name on Schedule II hereto and (iii) each of the
Underwriters, severally and not jointly, agrees to purchase from the Company and
the Firm Selling Stockholders the respective number of Firm Shares set forth
opposite that Underwriter's name in Schedule I hereto, at the purchase price of
$____ for each Firm Share.   The number of Firm Shares to be purchased by each
Underwriter from the Company and each Firm Selling Stockholder shall be as
nearly as practicable in the same proportion to the total number of Firm Shares
being sold by the Company and each Firm Selling Stockholder as the number of
Firm Shares being purchased by each Underwriter bears to the total number of
Firm Shares to be sold hereunder.

     (b) Subject to all the terms and conditions of this Agreement, the Company
and the Option Selling Stockholders grant the Option to the several Underwriters
to purchase, severally and not jointly, up to the maximum number of Option
Shares set forth in the first paragraph hereof, with respect to the Company, and
in Schedule III hereto, with respect to the Option Selling Stockholders, at the
same price per share as the Underwriters shall pay for the Firm Shares.  The
Option may be exercised only to cover over-allotments in the sale of the Firm
Shares by the Underwriters and may be exercised in whole or in part at any time
(but not more than once) on or before the 30th day after the date of this
Agreement upon written or telegraphic notice (the "Option Shares Notice") by the
                                                   --------------------
Representatives to the Company and the Option Selling Stockholders no later than
12:00 noon, New York City time, at least three and no more than five business
days before the date specified for closing in the Option Shares Notice (the

"Option Closing Date"), setting forth the aggregate number of Option Shares to
--------------------
be purchased and the time and date for such purchase.  On the Option Closing
Date, the Company and the Option Selling Stockholders will sell to the
Underwriters the number of Option Shares set forth in the Option Shares Notice,
and each Underwriter will purchase such percentage of the Option Shares as is
equal to the percentage of Firm Shares that such Underwriter is purchasing, as
adjusted by the Representatives in such manner as they deem advisable to avoid
fractional shares.

     2.     Delivery and Payment.  Delivery of the Firm Shares shall be made to
the Representatives for the accounts of the Underwriters against payment of the
purchase price by wire transfer payable in same-day funds to the order of the
Company for the Company Firm Shares to be sold by it, and by wire transfer
payable in same-day funds to the order of BankBoston, N.A., as custodian for the
Selling Stockholders (the "Custodian"), for the Selling Stockholder Firm Shares
                           ---------
to be sold by them, at the office of Needham & Company, Inc., 445 Park Avenue,
New York, New York 10022, at 10:00 a.m., New York City time, on the third (or,
if the purchase price set forth in Section 1(a) hereof is determined after 4:30
p.m., Washington D.C. time, the fourth) business day following the commencement
of the offering contemplated by this Agreement, or at such time on such other
date, not later than seven business days after the date of this Agreement, as
may be agreed upon by the Company and the Representatives (such date is
hereinafter referred to as the "Closing Date").
                                ------------

                                       2
<PAGE>

    To the extent the Option is exercised, delivery of the Option Shares against
payment by the Underwriters (in the manner specified above) will take place at
the offices specified above for the Closing Date at the time and date (which may
be the Closing Date) specified in the Option Shares Notice.

    If the Representatives so request, certificates evidencing the Shares shall
be in definitive form and shall be registered in such names and in such
denominations as the Representatives shall request at least two business days
prior to the Closing Date or the Option Closing Date, as the case may be, by
written notice to the Company.  For the purpose of expediting the checking and
packaging of certificates for the Shares, the Company agrees to make such
certificates available for inspection at least 24 hours prior to the Closing
Date or the Option Closing Date, as the case may be.

    The cost of original issue tax stamps, if any, in connection with the
issuance and delivery of the Firm Shares and Option Shares to the respective
Underwriters shall be borne by the Company.  The Company will pay and save each
Underwriter and any subsequent holder of the Shares harmless from any and all
liabilities with respect to or resulting from any failure or delay in paying
Federal and state stamp and other transfer taxes, if any, which may be payable
or determined to be payable in connection with the original issuance or sale to
such Underwriter of the Shares.

     3.  Representations and Warranties of the Company. The Company represents,
warrants and covenants to each Underwriter that:

     (a) A registration statement (Registration No. 333-78339) on Form S-1
relating to the Shares, including a preliminary prospectus and such amendments
to such registration statement as may have been required to the date of this
Agreement, has been prepared by the Company under the provisions of the
Securities Act of 1933, as amended (the "Act"), and the rules and regulations
                                         ---
(collectively referred to as the "Rules and Regulations") of the Securities and
                                  ---------------------
Exchange Commission (the "Commission") promulgated thereunder, and has been
                          ----------
filed with the Commission.  The term "Preliminary Prospectus" as used herein
                                      ----------------------
means a preliminary prospectus as contemplated by Rule 430 or Rule 430A of the
Rules and Regulations included at any time as part of the registration
statement.  Copies of such registration statement and amendments and of each
related preliminary prospectus have been delivered to the Representatives.  If
such registration statement has not become effective, a further amendment to
such registration statement, including a form of final prospectus, necessary to
permit such registration statement to become effective, will be filed promptly
by the Company with the Commission.  If such registration statement has become
effective, a final prospectus containing information permitted to be omitted at
the time of effectiveness by Rule 430A of the Rules and Regulations will be
filed promptly by the Company with the Commission in accordance with Rule 424(b)
of the Rules and Regulations.  The term "Registration Statement" means the
                                         ----------------------
registration statement as amended at the time it becomes or became effective
(the "Effective Date"), including financial statements and all exhibits and any
      --------------
information deemed to be included by Rule 430A, and includes any registration
statement relating to the offering contemplated by this Agreement and filed
pursuant to Rule 462(b) of the Rules and Regulations. The term "Prospectus"
                                                                ----------
means the prospectus as first filed with the Commission pursuant to Rule

                                       3
<PAGE>

424(b) of the Rules and Regulations or, if no such filing is required, the form
of final prospectus included in the Registration Statement at the Effective
Date.

     (b) No order preventing or suspending the use of any Preliminary Prospectus
has been issued by the Commission and no stop order suspending the effectiveness
of the Registration Statement or any post-effective amendment thereto has been
issued and no proceeding for that purpose has been initiated or threatened by
the Commission.  On the Effective Date, the date the Prospectus is first filed
with the Commission pursuant to Rule 424(b) (if required), at all times
subsequent to and including the Closing Date and, if later, the Option Closing
Date and when any post-effective amendment to the Registration Statement becomes
effective or any amendment or supplement to the Prospectus is filed with the
Commission, the Registration Statement and the Prospectus (as amended or as
supplemented if the Company shall have filed with the Commission any amendment
or supplement thereto), including the financial statements included in the
Prospectus, did and will comply with all applicable provisions of the Act and
the Rules and Regulations and will contain all statements required to be stated
therein in accordance with the Act and the Rules and Regulations.  On the
Effective Date and when any post-effective amendment to the Registration
Statement becomes effective, no part of the Registration Statement, the
Prospectus or any such amendment or supplement thereto did or will contain an
untrue statement of a material fact or omit to state a material fact required to
be stated therein or necessary in order to make the statements therein not
misleading.  At the Effective Date, the date the Prospectus or any amendment or
supplement to the Prospectus is filed with the Commission and at the Closing
Date and, if later, the Option Closing Date, the Prospectus did not and will not
contain any untrue statement of a material fact or omit to state a material fact
necessary to make the statements therein, in the light of the circumstances
under which they were made, not misleading.  The foregoing representations and
warranties in this Section 3(b) do not apply to any statements or omissions made
in reliance on and in conformity with information relating to any Underwriter
furnished in writing to the Company by the Representatives specifically for
inclusion in the Registration Statement or Prospectus or any amendment or
supplement thereto.  The Company acknowledges that the statements set forth
under the heading "Underwriting" in the Prospectus constitute the only
information relating to any Underwriter furnished in writing to the Company by
the Representatives specifically for inclusion in the Registration Statement.

    (c) All documents that have been previously filed by the Company with the
Commission pursuant to the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), when they became effective or were filed with the Commission,
-------------
as the case may be, complied in all material respects with the requirements of
the Exchange Act and the rules and regulations under the Exchange Act (the
"Exchange Act Rules and Regulations").
-----------------------------------

     (d) The Company does not own, and at the Closing Date and, if later, the
Option Closing Date, will not own, directly or indirectly, any shares of stock
or any other equity or long-term debt securities of any corporation or have any
equity interest in any corporation, firm, partnership, joint venture,
association or other entity, other than the subsidiaries listed in the
Prospectus or in the Company's Annual Report on Form 10-K for the fiscal year
ended June 27, 1998 (the "Subsidiaries").  The Company and each of its
                          ------------
Subsidiaries is, and at the Closing Date and, if later, the Option Closing Date,
will be, a corporation duly organized, validly existing and in good standing
under the laws of its jurisdiction of incorporation.  The Company and each of
its Subsidiaries has, and at the Closing Date and, if later, the Option Closing
Date,

                                       4
<PAGE>

will have, full power and authority to conduct all the activities conducted by
it, to own or lease all the assets owned or leased by it and to conduct its
business as described in the Registration Statement and the Prospectus. The
Company and each of its Subsidiaries is, and at the Closing Date and, if later,
the Option Closing Date, will be, duly licensed or qualified to do business and
in good standing as a foreign corporation in all jurisdictions in which the
nature of the activities conducted by it or the character of the assets owned or
leased by it makes such license or qualification necessary, except to the extent
that the failure to be so qualified or be in good standing would not materially
and adversely affect the Company and its Subsidiaries taken as a whole, or its
consolidated business, properties, financial condition or results of operations
(such effect is referred to herein as a "Material Adverse Effect"). All of the
                                         -----------------------
outstanding shares of capital stock of each Subsidiary have been duly authorized
and validly issued and are fully paid and nonassessable, and owned by the
Company free and clear of all claims, liens, charges and encumbrances; there are
no securities outstanding that are convertible into or exercisable or
exchangeable for capital stock of any Subsidiary. The Company is not, and at the
Closing Date and, if later, the Option Closing Date, will not be, engaged in any
discussions or a party to any agreement or understanding, written or oral,
regarding the acquisition of an interest in any corporation, firm, partnership,
joint venture, association or other entity where such discussions, agreements or
understandings would require amendment to the Registration Statement pursuant to
applicable securities laws. Complete and correct copies of the certificate of
incorporation and the by-laws of the Company and each of its Subsidiaries and
all amendments thereto have been delivered to the Representatives, and no
changes therein will be made subsequent to the date hereof and prior to the
Closing Date or, if later, the Option Closing Date.

     (e) All of the outstanding shares of capital stock of the Company
(including the Selling Stockholder Firm Shares and the Selling Stockholder
Option Shares to be sold by the Selling Stockholders under this Agreement) have
been duly authorized, validly issued and are fully paid and nonassessable and
were issued in compliance with all applicable state and federal securities laws;
the Firm Shares, and the Option Shares issued by the Company (if any), have been
duly authorized and when issued and paid for as contemplated herein will be
validly issued, fully paid and nonassessable; and no preemptive or similar
rights exist with respect to any of the Shares or the issue and sale thereof.
The Underwriters will receive good and valid title to the Shares purchased from
the Company, free and clear of all liens, claims, security interests, pledges,
charges, encumbrances, preemptive rights, stockholders' agreements, voting
trusts or other defects in title.  The description of the capital stock of the
Company in the Registration Statement and the Prospectus is, and at the Closing
Date and, if later, the Option Closing Date, will be, complete and accurate in
all material respects.  Except as set forth in the Prospectus, the Company does
not have outstanding, and at the Closing Date and, if later, the Option Closing
Date, will not have outstanding, any options to purchase, or any rights or
warrants to subscribe for, or any securities or obligations convertible into, or
any contracts or commitments to issue or sell, any shares of capital stock, or
any such warrants, convertible securities or obligations.  No further approval
or authority of stockholders or the Board of Directors of the Company will be
required for the transfer and sale of the Selling Stockholder Firm Shares and
the Selling Stockholder Option Shares or the issuance and sale of the Firm
Shares and the Option Shares as contemplated herein.

     (f) The financial statements and schedules included in the Registration
Statement or the Prospectus present fairly the financial condition of the
Company and its consolidated

                                       5
<PAGE>

Subsidiaries as of the respective dates thereof and the results of operations
and cash flows of the Company and its consolidated Subsidiaries for the
respective periods covered thereby, all in conformity with generally accepted
accounting principles applied on a consistent basis throughout the entire period
involved, except as otherwise disclosed in the Prospectus. No other financial
statements or schedules of the Company are required by the Act, the Exchange
Act, the Exchange Act Rules and Regulations or the Rules and Regulations to be
included in the Registration Statement or the Prospectus. PricewaterhouseCoopers
LLP (the "Accountants"), who have reported on such financial statements and
schedules, are independent accountants with respect to the Company as required
by the Act and the Rules and Regulations. The summary consolidated financial and
statistical data included in the Registration Statement present fairly the
information shown therein and have been compiled on a basis consistent with the
financial statements presented therein.

     (g) Subsequent to the respective dates as of which information is given in
the Registration Statement and the Prospectus and prior to the Closing Date and,
if later, the Option Closing Date, except as set forth in or contemplated by the
Registration Statement and the Prospectus, (i) there has not been and will not
have been any change in the capitalization of the Company (other than in
connection with the exercise of options to purchase the Company's Common Stock
granted pursuant to the Company's stock option plans from the shares reserved
therefor as described in the Registration Statement), or any Material Adverse
Effect arising for any reason whatsoever, (ii) the Company and its Subsidiaries
taken as a whole have not incurred nor will they incur, except in the ordinary
course of business as described in the Prospectus, any material liabilities or
obligations, direct or contingent, nor have the Company and its Subsidiaries
taken as a whole entered into nor will they enter into, except in the ordinary
course of business as described in the Prospectus, any material transactions
other than pursuant to this Agreement and the transactions referred to herein
and (iii) the Company has not and will not have paid or declared any dividends
or other distributions of any kind on any class of its capital stock.

     (h) The Company is not, and will not become as a result of the transactions
contemplated hereby or the use of proceeds as described in the Prospectus, an
"investment company" or an "affiliated person" of, or "promoter" or "principal
underwriter" for, an "investment company," as such terms are defined in the
Investment Company Act of 1940, as amended.

     (i) Except as set forth in the Registration Statement and the Prospectus,
there are no actions, suits or proceedings pending or, to the knowledge of the
Company, threatened against or affecting the Company, its Subsidiaries or any of
their officers in their capacity as such, before or by any Federal or state
court, commission, regulatory body, administrative agency or other governmental
body, domestic or foreign, wherein an unfavorable ruling, decision or finding
would have a Material Adverse Effect.

     (j) At the Closing Date, and, if later, the Option Closing Date, the
Company and each Subsidiary will not be, in default, under any contract or other
instrument to which it is a party or by which its property is bound or affected,
which default would have a Material Adverse Effect.  To the best knowledge of
the Company, no other party under any contract or other instrument to which it
or any of its Subsidiaries is a party is in default in any respect thereunder,
which default would have a Material Adverse Effect.  Neither the Company nor any

                                       6
<PAGE>

of its Subsidiaries is, and at the Closing Date and, if later, the Option
Closing Date, will be, in violation of any provision of its certificate of
incorporation or by-laws or other organizational documents.

     (k) No consent, approval, authorization or order of, or any filing or
declaration with, any court or governmental agency or body is required for the
consummation by the Company of the transactions on its part contemplated herein,
except such as have been obtained under the Act or the Rules and Regulations and
such as may be required under state securities or Blue Sky laws or the by-laws
and rules of the National Association of Securities Dealers, Inc. (the "NASD")
                                                                        ----
in connection with the purchase and distribution by the Underwriters of the
Shares.

     (l) The Company has full corporate power and authority to enter into this
Agreement.  This Agreement has been duly authorized, executed and delivered by
the Company and constitutes a valid and binding agreement of the Company,
enforceable against the Company in accordance with its terms, except as to (i)
rights to indemnity and contribution hereunder, which may be limited under
applicable law, (ii) bankruptcy and laws relating to the rights and remedies of
creditors generally and (iii) the availability of equitable remedies.  The
performance of this Agreement and the consummation of the transactions
contemplated hereby will not result in the creation or imposition of any lien,
charge or encumbrance upon any of the assets of the Company pursuant to the
terms or provisions of, or result in a breach or violation of any of the terms
or provisions of, or constitute a default under, or give any party a right to
terminate any of its obligations under, or result in the acceleration of any
obligation under, the certificate of incorporation or by-laws of the Company or
any of its Subsidiaries, except where the creation of such lien, charge or
encumbrance, breach, violation, default or right of termination would not have a
Material Adverse Effect, any indenture, mortgage, deed of trust, voting trust
agreement, loan agreement, bond, debenture, note agreement or other evidence of
indebtedness, lease, contract or other agreement or instrument to which the
Company or any of its Subsidiaries is a party or by which the Company, any of
its Subsidiaries or any of their properties is bound or affected, or violate or
conflict with any judgment, ruling, decree, order, statute, rule or regulation
of any court or other governmental agency or body applicable to the business or
properties of the Company or any of its Subsidiaries.

     (m) Except for properties and assets disposed of in the ordinary course of
business which are not in the aggregate material in amount, the Company or one
of its Subsidiaries has good and marketable title to all properties and assets
described in the Prospectus as owned by them, free and clear of all liens,
charges, encumbrances or restrictions, except as described in the Prospectus or
as is not material to the business of the Company or its Subsidiaries.  The
Company or one of its Subsidiaries has valid, subsisting and enforceable leases
for the properties described in the Prospectus as leased by them.  The Company
or one of its Subsidiaries owns or leases all such properties as are necessary
to its operations as now conducted or as proposed to be conducted, except where
the failure to so own or lease would not have a Material Adverse Effect.

     (n) There is no document, contract, agreement, instrument, lease, license,
certificate, permit or other arrangement, whether written or oral, of a
character required to be described in the Registration Statement or the
Prospectus or to be filed as an exhibit to the Registration Statement which is
not described or filed as required.  All such contracts to which

                                       7
<PAGE>

the Company or any of its Subsidiaries is a party have been duly authorized,
executed and delivered by the Company or such Subsidiary, constitute valid and
binding agreements of the Company or such Subsidiary and are enforceable against
and by the Company or such Subsidiary in accordance with its terms, except as to
(i) rights to indemnity and contribution thereunder, which may be limited under
applicable law, (ii) bankruptcy and laws relating to the rights and remedies of
creditors generally and (iii) the availability of equitable remedies.

     (o) No statement, representation, warranty or covenant made by the Company
in this Agreement or made in any certificate or document required by Section 6
of this Agreement to be delivered to the Representatives was or will be, when
made, inaccurate, untrue or incorrect in any material respect.

     (p) Neither the Company nor any of its directors, officers or controlling
persons has taken, directly or indirectly, any action designed, or which might
reasonably be expected, to cause or result, under the Act or otherwise, in, or
which has constituted, stabilization or manipulation of the price of any
security of the Company to facilitate the sale or resale of the Shares.

     (q) No holder of securities of the Company has rights to the registration
of any securities of the Company because of the filing of the Registration
Statement, which rights have not been exercised in accordance with their terms
or waived by the holder thereof as of the date hereof.

     (r) The Common Stock is listed and duly admitted to trading on the Nasdaq
National Market ("NNM"), and the Company has received notification that the
                  ---
listing of Shares to be issued by it has been approved, subject to official
notice of issuance of such Shares.  The Shares to be sold by the Selling
Stockholders hereunder are listed on the NNM.

     (s) Except as disclosed in or specifically contemplated by the Prospectus,
(i) to the Company's knowledge, the Company and its Subsidiaries have
trademarks, trade names, patent rights, copyrights, licenses, approvals and
governmental authorizations necessary to conduct their businesses as now
conducted and as presently proposed to be conducted, (ii) to the Company's
knowledge, none of the patent rights owned or licensed by the Company is
invalid, (iii) to the Company's knowledge, the Company and its Subsidiaries are
not infringing and copyrights, trade secrets, trademarks, trade name rights,
patent rights, or other similar rights of others, where such infringement would
have a Material Adverse Effect,  and (iv) to the Company's knowledge, no claim
has been made against the Company or any of its Subsidiaries, regarding
trademark, trade name, patent, copyright, license, trade secret or other
infringement which would have a Material Adverse Effect.

     (t) The Company and each of its Subsidiaries have filed all federal, state,
local and foreign income tax returns which have been required to be filed and
has paid all taxes and assessments received by it to the extent that such taxes
or assessments have become due other than taxes being contested in good faith.
Neither the Company nor any of its Subsidiaries has any tax deficiency which has
been or, to the knowledge of the Company, might be asserted or threatened
against them which would have a Material Adverse Effect.

                                       8
<PAGE>

    (u) With respect to the pro forma, "as adjusted" financial information set
forth in the Registration Statement, subject to the limitations set forth in the
Registration Statement as to such pro forma, "as adjusted" financial
information, management of the Company believes (i) the assumptions underlying
such pro forma adjustments are reasonable, and (ii) that such adjustments have
been properly applied to the historical amounts in the compilation of such
statements.

     (v) The Company or its Subsidiaries owns or possesses all authorizations,
approvals, orders, licenses, registrations, other certificates and permits of
and from all governmental regulatory officials and bodies, necessary to conduct
their respective businesses as contemplated in the Prospectus, except where the
failure to own or possess all such authorizations, approvals, orders, licenses,
registrations, other certificates and permits would not have a Material Adverse
Effect.  There is no proceeding pending or threatened which may cause any such
authorization, approval, order, license, registration, certificate or permit to
be revoked, withdrawn, cancelled, suspended or not renewed; and the Company and
each of its Subsidiaries are conducting their business in compliance with all
laws, rules and regulations applicable thereto (including, without limitation,
all applicable federal, state and local environmental laws and regulations)
except where such noncompliance would not have a Material Adverse Effect.

     (w) The Company and its Subsidiaries taken as a whole maintain insurance of
the types and in the amounts they deem adequate for their business, including,
but not limited to, insurance covering real and personal property owned or
leased by the Company and its Subsidiaries against theft, damage, destruction,
acts of vandalism and all other risks customarily insured against, all of which
insurance is in full force and effect.

     (x) Neither the Company nor any of its Subsidiaries has at any time during
the last five years (i) made any unlawful contribution to any candidate for
foreign office, or failed to disclose fully any contribution in violation of
law, or (ii) made any payment to any federal or state governmental officer or
official, or other person charged with similar public or quasi-public duties,
other than payments required or permitted by the laws of the United States or
any jurisdiction thereof.

    (y) The Company has not distributed and will not distribute any prospectus
or other offering material in connection with the offer and sale of the Shares,
other than the Preliminary Prospectus or the Prospectus or other offering
materials permitted by the Act and the Rules and Regulations to be distributed.

     4.     Representations, Warranties and Covenants of the Selling
Stockholders.  Each Selling Stockholder, severally and not jointly, represents,
warrants and covenants to each Underwriter that:

     (a) All consents, approvals, authorizations and orders necessary for the
execution and delivery by such Selling Stockholder of this Agreement and the
Power-of-Attorney and Custody Agreement (hereinafter referred to as a
"Stockholders' Agreement") relating hereto, and for the sale and delivery of the
------------------------
Selling Stockholder Firm Shares or the Selling Stockholder Option Shares, as the
case may be, to be sold by such Selling Stockholder hereunder, have been
obtained; and such Selling Stockholder has full right, power and authority to
enter into this Agreement and the Stockholders' Agreement, to make the
representations, warranties and

                                       9
<PAGE>

agreements hereunder and thereunder, and to sell, assign, transfer and deliver
the Shares to be sold by such Selling Stockholder hereunder.

     (b) Certificates in negotiable form, or warrant agreements accompanied by
duly completed notices of exercise or requests for cashless exercise,
representing all of the Selling Stockholder Firm Shares or the Selling
Stockholder Option Shares, as the case may be, to be sold by such Selling
Stockholder have been placed in custody under the Stockholders' Agreement, in
the form heretofore furnished to you, duly executed and delivered by such
Selling Stockholder to the Custodian, and such Selling Stockholder has duly
executed and delivered a power-of-attorney, in the form heretofore furnished to
you and included in the Stockholders' Agreement (the "Power-of-Attorney"),
                                                      -----------------
appointing Gerard E. Puorro and F. Paul Broyer, and each of them, as such
Selling Stockholder's attorney-in-fact (the "Attorneys-in-Fact") with authority
                                             -----------------
to execute and deliver this Agreement on behalf of such Selling Stockholder, to
determine (subject to the provisions of the Stockholders' Agreement) the
purchase price to be paid by the Underwriters to the Selling Stockholders as
provided in Section 1 hereof, to authorize the delivery of the Selling
Stockholder Firm Shares or the Selling Stockholder Option Shares, as the case
may be, to be sold by such Selling Stockholder hereunder and otherwise to act on
behalf of such Selling Stockholder in connection with the transactions
contemplated by this Agreement and the Stockholders' Agreement.

     (c) Such Selling Stockholder specifically agrees that the Selling
Stockholder Firm Shares or the Selling Stockholder Option Shares, as the case
may be, represented by the certificates or warrant agreements held in custody
for such Selling Stockholder under the Stockholders' Agreement are for the
benefit of and coupled with and subject to the interests of the Underwriters,
the Custodian, the Attorneys-in-Fact, each other Selling Stockholder and the
Company, that the arrangements made by such Selling Stockholder for such
custody, and the appointment by such Selling Stockholder of the Attorneys-in-
Fact by the Power-of-Attorney, are to that extent irrevocable, and that the
obligations of such Selling Stockholder hereunder shall not be terminated by
operation of law, whether by the death, disability, incapacity, liquidation or
dissolution of any Selling Stockholder or by the occurrence of any other event.
If any individual Selling Stockholder or any executor or trustee for a Selling
Stockholder should die or become incapacitated, or if any Selling Stockholder
that is an estate or trust should be terminated, or if any Selling Stockholder
that is a partnership or corporation should be dissolved, or if any other such
event should occur, before the delivery of the Selling Stockholder Firm Shares
or the Selling Stockholder Option Shares, as the case may be, hereunder,
certificates or warrant agreements representing the Selling Stockholder Firm
Shares or the Selling Stockholder Option Shares, as the case may be, shall be
delivered by or on behalf of the Selling Stockholders in accordance with the
terms and conditions of this Agreement and of the Stockholders' Agreement, and
actions taken by the Attorneys-in-Fact pursuant to the Powers-of-Attorney shall
be as valid as if such death, incapacity, termination, dissolution or other
event had not occurred, regardless of whether or not the Custodian, the
Attorneys-in-Fact, or any of them, shall have received notice of such death,
incapacity, termination, dissolution or other event.

     (d) This Agreement and the Stockholders' Agreement have each been duly
authorized, executed and delivered by such Selling Stockholder and each such
document constitutes a valid and binding obligation of such Selling Stockholder,
enforceable in accordance with its terms.

                                       10
<PAGE>

     (e) No consent, approval, authorization or order of, or any filing (other
than a final amendment to Schedule 13D, a Form 4 or an IRS Currency Transaction
Report, as may be required) or declaration with, any court or governmental
agency or body is required in connection with the sale of the Selling
Stockholder Firm Shares or the Selling Stockholder Option Shares, as the case
may be, by such Selling Stockholder or the consummation by such Selling
Stockholder of the transactions on its part contemplated by this Agreement and
the Stockholders' Agreement, except such as have been obtained under the Act or
the Rules and Regulations and such as may be required under state securities or
Blue Sky laws or the by-laws and rules of the NASD in connection with the
purchase and distribution by the Underwriters of the Shares to be sold by such
Selling Stockholder.

     (f) The sale of the Selling Stockholder Firm Shares or the Selling
Stockholder Option Shares, as the case may be, to be sold by such Selling
Stockholder hereunder and the performance by such Selling Stockholder of this
Agreement and the Stockholders' Agreement and the consummation of the
transactions contemplated hereby and thereby will not result in the creation or
imposition of any lien, charge or encumbrance upon any of the assets of such
Selling Stockholder pursuant to the terms or provisions of, or result in a
breach or violation of any of the terms or provisions of, or constitute a
default under, or give any party a right to terminate any of its obligations
under, or result in the acceleration of any obligation under, any indenture,
mortgage, deed of trust, voting trust agreement, loan agreement, bond,
debenture, note agreement or other evidence of indebtedness, lease, contract or
other agreement or instrument to which such Selling Stockholder is a party or by
which such Selling Stockholder or any of its properties is bound or affected, or
violate or conflict with any judgment, ruling, decree, order, statute, rule or
regulation of any court or other governmental agency or body applicable to such
Selling Stockholder or, if such Selling Stockholder is a corporation,
partnership or other entity, the organizational documents of such Selling
Stockholder.

     (g) Such Selling Stockholder has, or in the case of any warrant agreements
upon the valid exercise or cashless exercise thereof will have, and at the
Closing Date or the Option Closing Date, as applicable, will have, good and
marketable title to the Selling Stockholder Firm Shares or the Selling
Stockholder Option Shares, as the case may be, to be sold by such Selling
Stockholder hereunder, free and clear of all liens, encumbrances, equities or
claims whatsoever; and, upon delivery of such Selling Stockholder Firm Shares or
the Selling Stockholder Option Shares, as the case may be, and payment therefor
pursuant hereto, good and marketable title to such Selling Stockholder Firm
Shares or Selling Stockholder Option Shares, as the case may be, free and clear
of all liens, encumbrances, equities or claims whatsoever, will be delivered to
the Underwriters.

     (h) On the Closing Date or the Option Closing Date, as applicable, all
stock transfer or other taxes (other than income taxes) that are required to be
paid in connection with the sale and transfer of the Shares to be sold by such
Selling Stockholder to the several Underwriters hereunder will have been fully
paid or provided for by such Selling Stockholder and all laws imposing such
taxes will have been fully complied with.

     (i) Other than as permitted by the Act and the Rules and Regulations, such
Selling Stockholder has not distributed and will not distribute any Preliminary
Prospectus, the Prospectus or any other offering material in connection with the
offering and sale of the Shares.

                                       11
<PAGE>

Such Selling Stockholder has not taken and will not at any time take, directly
or indirectly, any action designed, or which might reasonably be expected, to
cause or result in, or which will constitute, stabilization of the price of
shares of Common Stock to facilitate the sale or resale of any of the Shares.

     (j) All information provided by such Selling Stockholder contained in the
Registration Statement, any Preliminary Prospectus, the Prospectus or any
amendment or supplement thereto complied or will comply in all material respects
with all applicable requirements of the Act and the Rules and Regulations and
does not and will not contain any untrue statement of a material fact or omit to
state any material fact required to be stated therein or necessary to make the
statements therein not misleading.

     (k) In  order to document the Underwriters' compliance with the reporting
and withholding provisions of the Tax Equity and Fiscal Responsibility Act of
1982 with respect to the transactions herein contemplated, such Selling
Stockholder agrees to deliver to you prior to or at the Closing Date or the
Option Closing Date, as applicable, a properly completed and executed United
States Treasury Department Form W-9 (or other applicable form or statement
specified by Treasury Department regulations in lieu thereof).

     5.  Agreements of the Company and the Selling Stockholders.  Each of the
Company and the Selling Stockholders (with respect to subsections (i) and (n)
only) respectively covenants and agrees with the several Underwriters as
follows:

     (a) The Company will not, either prior to the Effective Date or thereafter
during such period as the Prospectus is required by law to be delivered in
connection with sales of the Shares by an Underwriter or dealer, file any
amendment or supplement to the Registration Statement or the Prospectus, unless
a copy thereof shall first have been submitted to the Representatives within a
reasonable period of time prior to the filing thereof and the Representatives
shall not have reasonably objected thereto in good faith.

     (b) The Company will use its best efforts to cause the Registration
Statement to become effective, and will notify the Representatives promptly, and
will confirm such advice in writing, (i) when the Registration Statement has
become effective and when any post-effective amendment thereto becomes
effective, (ii) of any request by the Commission for amendments or supplements
to the Registration Statement or the Prospectus or for additional information,
(iii) of the issuance by the Commission of any stop order suspending the
effectiveness of the Registration Statement or the initiation of any proceedings
for that purpose or the threat thereof, (iv) of the happening of any event
during the period mentioned in the second sentence of Section 5(e) that in the
judgment of the Company makes any statement made in the Registration Statement
or the Prospectus untrue or that requires the making of any changes in the
Registration Statement or the Prospectus in order to make the statements
therein, in the light of the circumstances in which they are made, not
misleading and (v) of receipt by the Company or any representative or attorney
of the Company of any other communication from the Commission relating to the
Company, the Registration Statement, any Preliminary Prospectus or the
Prospectus.  If at any time the Commission shall issue any order suspending the
effectiveness of the Registration Statement, the Company will make every
reasonable effort to obtain the withdrawal of such order at the earliest
possible moment.  If the Company has omitted any information from the
Registration Statement pursuant to Rule 430A of the Rules

                                       12
<PAGE>

and Regulations, the Company will comply with the provisions of and make all
requisite filings with the Commission pursuant to said Rule 430A and notify the
Representatives promptly of all such filings.

     (c) The Company will furnish to each Representative, without charge, one
signed copy of the Registration Statement and of any post-effective amendment
thereto, including financial statements and schedules, and all exhibits thereto
and will furnish to the Representatives, without charge, for transmittal to each
of the other Underwriters, a copy of the Registration Statement and any post-
effective amendment thereto, including financial statements and schedules but
without exhibits.

     (d) The Company will comply with all the provisions of any undertakings
contained in the Registration Statement.

     (e) On the Effective Date, and thereafter from time to time, the Company
will deliver to each of the Underwriters, without charge, as many copies of the
Prospectus or any amendment or supplement thereto as the Representatives may
reasonably request.  The Company consents to the use of the Prospectus or any
amendment or supplement thereto by the several Underwriters and by all dealers
to whom the Shares may be sold, both in connection with the offering or sale of
the Shares and for any period of time thereafter during which the Prospectus is
required by law to be delivered in connection therewith.  If during such period
of time any event shall occur which in the reasonable judgment of the Company or
counsel to the Underwriters should be set forth in the Prospectus in order to
make any statement therein, in the light of the circumstances under which it was
made, not misleading, or if it is necessary to supplement or amend the
Prospectus to comply with law, the Company will forthwith prepare and duly file
with the Commission an appropriate supplement or amendment thereto, and will
deliver to each of the Underwriters, without charge, such number of copies of
such supplement or amendment to the Prospectus as the Representatives may
reasonably request.

     (f) Prior to any public offering of the Shares, the Company will cooperate
with the Representatives and counsel to the Underwriters in connection with the
registration or qualification of the Shares for offer and sale under the
securities or Blue Sky laws of such jurisdictions as the Representatives may
reasonably request; provided, that in no event shall the Company be obligated to
qualify to do business in any jurisdiction where it is not now so qualified or
to take any action which would subject it to general service of process in any
jurisdiction where it is not now so subject.

     (g) During the period of five years commencing on the Effective Date, the
Company will furnish to the Representatives and each other Underwriter who may
so request copies of such financial statements and other periodic and special
reports as the Company may from time to time distribute generally to the holders
of any class of its capital stock, and will furnish to the Representatives and
each other Underwriter who may so request a copy of each annual or other report
it shall be required to file with the Commission.

     (h) The Company will make generally available to holders of its securities
as soon as may be practicable but in no event later than the last day of the
fifteenth full calendar month following the calendar quarter in which the
Effective Date falls, an earnings statement (which need not be audited but shall
be in reasonable detail) for a period of 12 months ended

                                       13
<PAGE>

commencing after the Effective Date, and satisfying the provisions of Section
11(a) of the Act (including Rule 158 of the Rules and Regulations).

     (i) Whether or not the transactions contemplated by this Agreement are
consummated or this Agreement is terminated, the Company will pay or reimburse,
if paid by the Representatives, all costs and expenses incident to the
performance of the obligations of the Company and the Selling Stockholders under
this Agreement and in connection with the transactions contemplated hereby,
including but not limited to costs and expenses of or relating to (i) the
preparation, printing and filing of the Registration Statement and exhibits to
it, each Preliminary Prospectus, Prospectus and any amendment or supplement to
the Registration Statement or Prospectus, (ii) the preparation and delivery of
certificates representing the Shares, (iii) the printing of this Agreement, the
Agreement Among Underwriters, any Selected Dealer Agreements, any Underwriters'
Questionnaires, the Stockholders' Agreements, any Underwriters' Powers of
Attorney, and any invitation letters to prospective Underwriters, (iv)
furnishing (including costs of shipping and mailing) such copies of the
Registration Statement, the Prospectus and any Preliminary Prospectus, and all
amendments and supplements thereto, as may be requested for use in connection
with the offering and sale of the Shares by the Underwriters or by dealers to
whom Shares may be sold, (v) the listing of the Shares on the NNM, (vi) any
filings required to be made by the Underwriters with the NASD, and the fees,
disbursements and other charges of counsel for the Underwriters in connection
therewith (except fees, disbursements and other charges of counsel for the
Underwriters relating to the form or adequacy of the underwriting arrangements),
(vii) the registration or qualification of the Shares for offer and sale under
the securities or Blue Sky laws of such jurisdictions designated pursuant to
Section 5(f), including the fees, disbursements and other charges of counsel to
the Underwriters in connection therewith, and the preparation and printing of
preliminary, supplemental and final Blue Sky memoranda, (viii) fees,
disbursements and other charges of counsel to the Company (but not those of
counsel for the Underwriters, except as otherwise provided herein), (ix) the
transfer agent for the Shares, and (x) any fees and expenses of the Attorneys-
in-Fact and the Custodian.  The Underwriters may deem the Company to be the
primary obligor with respect to all costs, fees and expenses to be paid by the
Company and by the Selling Stockholders.  The Selling Stockholders will pay
(directly or by reimbursement) all fees and expenses incident to the performance
of their obligations under this Agreement that are not otherwise specifically
provided for herein, including but not limited to any fees and expenses of
counsel for such Selling Stockholders, and all expenses and taxes incident to
the sale and delivery of the Shares to be sold by such Selling Stockholders to
the Underwriters hereunder.

     (j) The Company will not at any time, directly or indirectly, take any
action designed or which might reasonably be expected to cause or result in, or
which will constitute, stabilization of the price of the shares of Common Stock
to facilitate the sale or resale of any of the Shares.

     (k) The Company will apply the net proceeds from the offering and sale of
the Shares to be sold by the Company in the manner set forth in the Prospectus
under "Use of Proceeds".

     (l) During the period beginning from the date hereof and continuing to and
including the date 90 days after the date of the Prospectus, without the prior
written consent of

                                       14
<PAGE>

Needham & Company, Inc., the Company will not offer, sell, contract to sell,
grant options to purchase or otherwise dispose of any of the Company's equity
securities of the Company or any other securities convertible into or
exchangeable with its Common Stock or other equity security (other than pursuant
to stock option plans disclosed in the Prospectus or the conversion of
convertible securities or the exercise of warrants outstanding on the date of
this Agreement).

     (m) During the period of 90 days after the date of the Prospectus, the
Company will not, without the prior written consent of Needham & Company, Inc.,
grant options to purchase shares of Common Stock at a price less than the public
offering price, except in connection with the Company's stock option plans
disclosed in the Prospectus.  During the period of 90 days after the date of the
Prospectus, the Company will not file with the Commission or cause to become
effective any registration statement relating to any securities of the Company
without the prior written consent of Needham & Company, Inc.

     (n) The Selling Stockholders will, and the Company will cause each of its
executive officers and directors to, enter into lock-up agreements with the
Representatives to the effect that they will not, without the prior written
consent of Needham & Company, Inc., sell, contract to sell or otherwise dispose
of any shares of Common Stock or rights to acquire such shares according to the
terms set forth in Schedule IV hereto.

     6.  Conditions of the Obligations of the Underwriters. The obligations of
each Underwriter hereunder are subject to the following conditions:

     (a) Notification that the Registration Statement has become effective shall
be received by the Representatives not later than 5:00 p.m., New York City time,
on the date of this Agreement or at such later date and time as shall be
consented to in writing by the Representatives and all filings required by Rule
424 and Rule 430A of the Rules and Regulations shall have been made.

     (b) (i) No stop order suspending the effectiveness of the Registration
Statement shall have been issued and no proceedings for that purpose shall be
pending or threatened by the Commission, (ii) no order suspending the
effectiveness of the Registration Statement or the qualification or registration
of the Shares under the securities or Blue Sky laws of any jurisdiction shall be
in effect and no proceeding for such purpose shall be pending before or
threatened or contemplated by the Commission or the authorities of any such
jurisdiction, (iii) any request for additional information on the part of the
staff of the Commission or any such authorities shall have been complied with to
the satisfaction of the staff of the Commission or such authorities and (iv)
after the date hereof no amendment or supplement to the Registration Statement
or the Prospectus shall have been filed unless a copy thereof was first
submitted to the Representatives and the Representatives do not object thereto
in good faith, and the Representatives shall have received certificates, dated
the Closing Date and, if later, the Option Closing Date and signed by the
President and Treasurer of the Company (who may, as to proceedings threatened,
rely upon their knowledge), to the effect of clauses (i), (ii) and (iii) of this
paragraph.

     (c) Since the respective dates as of which information is given in the
Registration Statement and the Prospectus, (i) there shall not have been a
material adverse change in the general affairs, business, properties,
management, financial condition or results of operations

                                       15
<PAGE>

of the Company or any of its Subsidiaries, whether or not arising from
transactions in the ordinary course of business, in each case other than as
described in or contemplated by the Registration Statement and the Prospectus,
and (ii) the Company shall not have sustained any material loss or interference
with its business or properties from fire, explosion, flood or other casualty,
whether or not covered by insurance, or from any labor dispute or any court or
legislative or other governmental action, order or decree, which is not
described in the Registration Statement and the Prospectus, if in the judgment
of the Representatives any such development makes it impracticable or
inadvisable to consummate the sale and delivery of the Shares by the
Underwriters at the public offering price.

     (d) Since the respective dates as of which information is given in the
Registration Statement and the Prospectus, there shall have been no litigation
or other proceeding instituted against the Company, any of its Subsidiaries, or
any of their officers or directors in their capacities as such, before or by any
Federal, state or local court, commission, regulatory body, administrative
agency or other governmental body, domestic or foreign, in which litigation or
proceeding an unfavorable ruling, decision or finding would have a Material
Adverse Effect.

     (e) Each of the representations and warranties of the Company and the
Selling Stockholders contained herein shall be true and correct in all material
respects at the Closing Date and, with respect to the Option Shares, at the
Option Closing Date, and all covenants and agreements contained herein to be
performed on the part of the Company or the Selling Stockholders and all
conditions contained herein to be fulfilled or complied with by the Company or
the Selling Stockholders at or prior to the Closing Date and, with respect to
the Option Shares, at or prior to the Option Closing Date, shall have been duly
performed, fulfilled or complied with.

     (f) The Representatives shall have received an opinion, dated the Closing
Date and, with respect to the Option Shares, the Option Closing Date,
satisfactory in form and substance to the Representatives and counsel for the
Underwriters from Testa Hurwitz & Thibeault, LLP, counsel to the Company and the
Selling Stockholders, with respect to the following matters:

         (i) Each of the Company and Candela Skin Care Center, Inc., a wholly-
    owned subsidiary of the Company ("CSCC") is a corporation duly organized,
    validly existing and in good standing under the laws of its jurisdiction of
    incorporation; has full corporate power and authority to conduct all the
    activities conducted by it, to own or lease all the assets owed or leased by
    it and to conduct its business as described in the Registration Statement
    and Prospectus; and is duly licensed or qualified to do business and is in
    good standing as a foreign corporation in ________________________________.

         (ii) To such counsel's knowledge, all of the outstanding shares of
    capital stock of the Company (including the Selling Stockholder Option
    Shares) have been duly authorized, validly issued and are fully paid and
    nonassessable, were issued pursuant to exemptions from the registration and
    qualification requirements of federal and applicable state securities laws,
    and were not issued in violation of or subject to any preemptive or, to such
    counsel's knowledge, similar rights;

                                       16
<PAGE>

         (iii) The Shares to be sold by the Company hereunder have been duly
    authorized and, when issued and paid for as contemplated by this Agreement,
    will be validly issued, fully paid and nonassessable; and no preemptive or
    similar rights exist with respect to any of the Shares or the issue and sale
    thereof.

         (iv)  To such counsel's knowledge, the Company does not own or control,
    directly or indirectly, any shares of stock or any other equity or long-term
    debt securities of any corporation or have any equity interest in any
    corporation, firm, partnership, joint venture, association or other entity,
    other than __________________. All of the outstanding shares of capital
    stock of CSCC have been duly authorized and validly issued and are fully
    paid and nonassessable, and owned by the Company free and clear of all
    claims, liens, charges and encumbrances; to such counsel's knowledge, there
    are no securities outstanding that are convertible into or exercisable or
    exchangeable for capital stock of CSCC.

         (v)   The authorized and outstanding capital stock of the Company is as
    set forth in the Registration Statement and the Prospectus in the column
    entitled "Actual" under the caption "Capitalization" (except for subsequent
    issuances, if any, pursuant to this Agreement or pursuant to reservations,
    agreements, employee benefit plans or the exercise of convertible
    securities, options or warrants referred to in the Prospectus).  To such
    counsel's knowledge, except as disclosed in or specifically contemplated by
    the Prospectus, there are no outstanding options, warrants of other rights
    calling for the issuance of, and no commitments, plans or arrangements to
    issue, any shares of capital stock of the Company or any security
    convertible into or exchangeable or exercisable for capital stock of the
    Company. The description of the capital stock of the Company in the
    Registration Statement and the Prospectus conforms in all material respects
    to the terms thereof.

         (vi)  To such counsel's knowledge, there are no legal or governmental
    proceedings pending or threatened to which the Company CSCC is a party or to
    which any of their respective properties is subject that are required to be
    described in the Registration Statement or the Prospectus but are not so
    described.

         (vii)  No consent, approval, authorization or order of, or any filing
    or declaration with, any court or governmental agency or body is required
    for the consummation by the Company of the transactions on its part
    contemplated under this Agreement, except such as have been obtained or made
    under the Act or the Rules and Regulations and such as may be required under
    state securities or Blue Sky laws or the by-laws and rules of the NASD in
    connection with the purchase and distribution by the Underwriters of the
    Shares.

         (viii) The Company has full corporate power and authority to enter
    into this Agreement.  This Agreement has been duly authorized, executed and
    delivered by the Company.

         (ix) The execution and delivery of this Agreement, the compliance by
    the Company with all of the terms hereof and the consummation of the
    transactions contemplated hereby does not contravene any provision of
    applicable law or the

                                       17
<PAGE>

    certificate of incorporation or By-Laws of the Company or CSCC, and to such
    counsel's knowledge will not result in the creation or imposition of any
    lien, charge or encumbrance upon any of the assets of the Company or CSCC
    pursuant to the terms and provisions of, result in a breach or violation of
    any of the terms or provisions of, or constitute a default under, or give
    any party a right to terminate any of its obligations under, or result in
    the acceleration of any obligation under, any indenture, mortgage, deed of
    trust, voting trust agreement, loan agreement, bond, debenture, note
    agreement or other evidence of indebtedness, lease, contract or other
    agreement or instrument known to such counsel to which the Company or CSCC
    is a party or by which the Company, CSCC, or any of their respective
    properties is bound or affected, or violate or conflict with (i) any
    judgment, ruling, decree or order known to such counsel or (ii) any statute,
    rule or regulation of any court or other governmental agency or body
    applicable to the business or properties of the Company or CSCC.

         (x)    To such counsel's knowledge, there is no document or contract of
    a character required to be described in the Registration Statement or the
    Prospectus or to be filed as an exhibit to the Registration Statement which
    is not described as required, and each description of such contracts and
    documents that is contained in the Registration Statement and Prospectus
    fairly presents in all material respects the information required under the
    Act and the Rules and Regulations.

         (xi)   The statements under the caption "Description of Capital Stock"
    in the Prospectus, insofar as the statements constitute a summary of
    documents referred to therein or matters of law, are accurate summaries and
    fairly and correctly present, in all material respects, the information
    called for with respect to such documents and matters (provided, however,
    that such counsel may rely on representations of the Company with respect to
    the factual matters contained in such statements, and provided further that
    such counsel shall state that nothing has come to the attention of such
    counsel which leads them to believe that such representations are not true
    and correct in all material respects).

         (xii)  The Company is not an "investment company" or an "affiliated
    person" of, or "promoter" or "principal underwriter" for, an "investment
    company," as such terms are defined in the Investment Company Act of 1940,
    as amended.

         (xiii) The Selling Stockholder Firm Shares and the Selling Stockholder
    Option Shares are duly listed on the NNM and the Shares to be issued by the
    Company have been duly authorized for listing on the NNM, subject to notice
    of issuance.

         (xiv)  To such counsel's knowledge, no holder of securities of the
    Company has rights, which have not been waived, to require the register with
    the Commission shares of Common Stock or other securities, as part of the
    offering contemplated hereby.

         (xv)   The Registration Statement has become effective under the Act,
    and to the best of such counsel's knowledge, no stop order suspending the
    effectiveness

                                       18
<PAGE>

    of the Registration Statement has been issued and no proceeding for that
    purpose has been instituted or is pending, threatened or contemplated.

         (xvi)    The Registration Statement and the Prospectus comply as to
    form in all material respects with the requirement of the Act and the Rules
    and Regulations (other than the financial statements, schedules and other
    financial data contained in the Registration Statement or the Prospectus, as
    to which such counsel need express no opinion).

         (xvii)   Such counsel has participated in the preparation of the
    Registration Statement and Prospectus and has no reason to believe that, as
    of the Effective Date the Registration Statement, or any amendment or
    supplement thereto, (other than the financial statements, schedules and
    other financial data contained therein, as to which such counsel need
    express no opinion) contained any untrue statement of a material fact or
    omitted to state a material fact required to be stated therein or necessary
    to make the statements therein not misleading or that the Prospectus, or any
    amendment or supplement thereto, as of its date and the Closing Date and, if
    later, the Option Closing Date, contained or contains any untrue statement
    of a material fact or omitted or omits to state a material fact necessary to
    make the statements therein, in the light of the circumstances under which
    they were made, not misleading (other than the financial statements,
    schedules and other financial data contained therein, as to which such
    counsel need express no opinion).

         (xviii)  This Agreement and the Stockholders' Agreement have each been
    duly executed and delivered by or on behalf of each Selling Stockholder; the
    Stockholders' Agreement constitutes a valid and binding agreement of such
    Selling Stockholder in accordance with its terms, except as enforceability
    may be limited by the application of bankruptcy, insolvency or other laws
    affecting creditors' rights generally or by general principles of equity;
    the Attorneys-in-Fact and the Custodian have been duly authorized by such
    Selling Stockholder to deliver the Shares on behalf of such Selling
    Stockholder in accordance with the terms of this Agreement; and the sale of
    the Shares to be sold by such Selling Stockholder hereunder, the performance
    by such Selling Stockholder of this Agreement and the Stockholders'
    Agreement and the consummation of the transactions contemplated hereby and
    thereby will not, to such counsel's knowledge, result in a breach or
    violation of any of the terms or provisions of, or constitute a default
    under, or give any party a right to terminate any of its obligations under,
    or result in the acceleration of any obligation under any indenture,
    mortgage, deed of trust, voting trust agreement, loan agreement, bond,
    debenture, note agreement or other evidence of indebtedness, lease, contract
    or other agreement or instrument to which such Selling Stockholder is a
    party or by which such Selling Stockholder or any of its properties is bound
    or affected, or violate or conflict with any judgment, ruling, decree,
    order, statute, rule or regulation of any court or other governmental agency
    or body applicable to such Selling Stockholder or, if such Selling
    Stockholder is a corporation, partnership or other entity, the
    organizational documents of such Selling Stockholder.

         (xix)    No consent, approval, authorization or order of, or any filing
    (other than the filing by Signatronics Asset Holdings Private Limited of a
    final amendment

                                       19
<PAGE>

    to Schedule 13D and Form 4) or declaration with, any court or governmental
    agency or body is required for the consummation by the Selling Stockholders
    of the transactions on their part contemplated by this Agreement, except
    such as have been obtained or made under the Act or the Rules and
    Regulations and such as may be required under state securities or Blue Sky
    laws or the by-laws and rules of the NASD in connection with the purchase
    and distribution by the Underwriters of the Shares.

         (xx) Each Selling Stockholder has full legal right, power and authority
    to enter into this Agreement and the Stockholders' Agreement and to sell,
    assign, transfer and deliver the Shares to be sold by such Selling
    Stockholder hereunder and, upon payment for such Shares and assuming that
    the Underwriters are purchasing such Shares in good faith and without notice
    of any other adverse claim within the meaning of the Uniform Commercial
    Code, the Underwriters will have acquired all rights of such Selling
    Stockholder in such Shares free of any adverse claim, any lien in favor of
    the Company and any restrictions on transfer imposed by the Company.

    In rendering the opinions in subparagraphs (xviii) - (xx), such counsel may
rely upon opinions of other counsel retained by the Selling Stockholders
reasonably acceptable to the Representatives and as to matters of fact on
certificates of the Selling Stockholders, officers of the Company and
governmental officials and the representations and warranties of the Company and
the Selling Stockholders contained in this Agreement and the Stockholders'
Agreement, provided that the opinion of counsel to the Company and Selling
Stockholders shall state that they are doing so, that they have no reason to
believe that they and the Underwriters are not entitled to rely on such opinions
or certificates and that copies of such opinions or certificates are to be
attached to the opinion.

    In rendering such opinion, such counsel may rely upon as to matters of local
law on opinions of counsel satisfactory in form and substance to the
Representatives and counsel for the Underwriters, provided that the opinion of
counsel to the Company and the Selling Stockholders shall state that they are
doing so, that they have no reason to believe that they and the Underwriters are
not entitled to rely on such opinions and that copies of such opinions are to be
attached to the opinion.

     (g) The Representatives shall have received an opinion, dated the Closing
Date and the Option Closing Date, from Choate, Hall & Stewart, counsel to the
Underwriters, with respect to the Registration Statement, the Prospectus and
this Agreement, which opinion shall be satisfactory in all respects to the
Representatives.

     (h) Concurrently with the execution and delivery of this Agreement, the
Accountants shall have furnished to the Representatives a letter, dated the date
of its delivery, addressed to the Representatives and in form and substance
satisfactory to the Representatives, confirming that they are independent
accountants with respect to the Company and its Subsidiaries as required by the
Act and the Exchange Act and the Rules and Regulations and with respect to
certain financial and other statistical and numerical information contained in
the Registration Statement.  At the Closing Date and, as to the Option Shares,
the Option Closing Date, the Accountants shall have furnished to the
Representatives a letter, dated the date of its

                                       20
<PAGE>

delivery, which shall confirm, on the basis of a review in accordance with the
procedures set forth in the letter from the Accountants, that nothing has come
to their attention during the period from the date of the letter referred to in
the prior sentence to a date (specified in the letter) not more than five days
prior to the Closing Date and the Option Closing Date, as the case may be, which
would require any change in their letter dated the date hereof if it were
required to be dated and delivered at the Closing Date and the Option Closing
Date.

     (i) Concurrently with the execution and delivery of this Agreement and at
the Closing Date and, as to the Option Shares, the Option Closing Date, there
shall be furnished to the Representatives a certificate, dated the date of its
delivery, signed by each of the President and Treasurer of the Company, in form
and substance satisfactory to the Representatives, to the effect that:

         (i)   Each signer of such certificate has carefully examined the
    Registration Statement and the Prospectus as of the date of such
    certificate, and (A) such documents are true and correct in all material
    respects and do not omit to state a material fact required to be stated
    therein or necessary in order to make the statements therein not untrue or
    misleading and (B) in the case of the certificate delivered at the Closing
    Date and the Option Closing Date, since the Effective Date no event has
    occurred as a result of which it is necessary to amend or supplement the
    Prospectus in order to make the statements therein not untrue or misleading.

         (ii)  Each of the representations and warranties of the Company
    contained in this Agreement were, when originally made, and are, at the time
    such certificate is delivered, true and correct.

         (iii) Each of the covenants required to be performed by the Company
    herein on or prior to the date of such certificate has been duly, timely and
    fully performed and each condition herein required to be satisfied or
    fulfilled on or prior to the date of such certificate has been duly, timely
    and fully satisfied or fulfilled.

     (j) Concurrently with the execution and delivery of this Agreement and at
the Closing Date and, as to the Option Shares, the Option Closing Date, there
shall be furnished to the Representatives a certificate, dated the date of its
delivery, signed by the Selling Stockholders (or the Attorneys-in-Fact on their
behalf), in form and substance satisfactory to the Representatives, to the
effect that the representations and warranties of the Selling Stockholders
contained herein are true and correct in all material respects on and as of the
date of such certificate as if made on and as of the date of such certificate,
and each of the covenants and conditions required herein to be performed or
complied with by the Selling Stockholders on or prior to the date of such
certificate has been duly, timely and fully performed or complied with.

     (k) On or prior to the Closing Date, the Representatives shall have
received the executed agreements referred to in Section 5(o).

     (l) The Shares shall be qualified for sale in such jurisdictions as the
Representatives may reasonably request and each such qualification shall be in
effect and not subject to any stop order or other proceeding on the Closing Date
or the Option Closing Date.

                                       21
<PAGE>

     (m) Prior to the Closing Date, the Shares shall have been duly authorized
for listing on the NNM upon official notice of issuance.

     (n) The Company and the Selling Stockholders shall have furnished to the
Representatives such certificates, in addition to those specifically mentioned
herein, as the Representatives may have reasonably requested as to the accuracy
and completeness at the Closing Date and the Option Closing Date of any
statement in the Registration Statement or the Prospectus, as to the accuracy at
the Closing Date and the Option Closing Date of the representations and
warranties of the Company and the Selling Stockholders herein, as to the
performance by the Company and the Selling Stockholders of its and their
respective obligations hereunder, or as to the fulfillment of the conditions
concurrent and precedent to the obligations hereunder of the Representatives.

     7.  Indemnification.

     (a) The Company will indemnify and hold harmless each Underwriter, the
directors, officers, employees and agents of each Underwriter and each person,
if any, who controls each Underwriter within the meaning of Section 15 of the
Act or Section 20 of the Exchange Act, from and against any and all losses,
claims, liabilities, expenses and damages (including any and all investigative,
legal and other expenses reasonably incurred in connection with, and any amount
paid in settlement of, any action, suit or proceeding or any claim asserted), to
which they, or any of them, may become subject under the Act, the Exchange Act
or other Federal or state statutory law or regulation, at common law or
otherwise, insofar as such losses, claims, liabilities, expenses or damages
arise out of or are based on any untrue statement or alleged untrue statement of
a material fact contained in any Preliminary Prospectus, the Registration
Statement or the Prospectus or any amendment or supplement to the Registration
Statement or the Prospectus, or the omission or alleged omission to state in
such document a material fact required to be stated in it or necessary to make
the statements in it not misleading in the light of the circumstances in which
they were made, or arise out of or are based in whole or in part on any
inaccuracy in the representations and warranties of the Company contained herein
or any failure of the Company to perform its obligations hereunder or under law
in connection with the transactions contemplated hereby; provided, however, that
(i) the Company will not be liable to the extent that such loss, claim,
liability, expense or damage arises from the sale of the Shares in the public
offering to any person by an Underwriter and is based on an untrue statement or
omission or alleged untrue statement or omission made in reliance on and in
conformity with information relating to any Underwriter furnished in writing to
the Company by the Representatives, on behalf of any Underwriter, expressly for
inclusion in the Registration Statement, the Preliminary Prospectus or the
Prospectus; and (ii) the Company will not be liable to any Underwriter, the
directors, officers, employees or agents of such Underwriter or any person
controlling such Underwriter with respect to any loss, claim, liability,
expense, or damage arising out of or based on any untrue statement or omission
or alleged untrue statement or omission or alleged omission to state a material
fact in the Preliminary Prospectus which is corrected in the Prospectus if the
person asserting any such loss, claim, liability, charge or damage purchased
Shares from such Underwriter but was not sent or given a copy of the Prospectus
at or prior to the written confirmation of the sale of such Shares to such
person and if copies of the Prospectus were

                                       22
<PAGE>

timely delivered to such Underwriter pursuant to Section 5 hereof. This
indemnity agreement will be in addition to any liability that the Company might
otherwise have.

    (b) Each Selling Stockholder will indemnify and hold harmless each
Underwriter, the directors, officers, employees and agents of each Underwriter
and each person, if any, who controls each Underwriter within the meaning of
Section 15 of the Act or Section 20 of the Exchange Act, from and against any
and all losses, claims, liabilities, expenses and damages (including any and all
investigative, legal and other expenses reasonably incurred in connection with,
and any amount paid in settlement of, any action, suit or proceeding or any
claim asserted), to which the Selling Stockholders, or any of them, may become
subject under the Act, the Exchange Act or other Federal or state statutory law
or regulation, at common law or otherwise, insofar as such losses, claims,
liabilities, expenses or damages arise out of or are based on any untrue
statement or alleged untrue statement of a material fact contained in any
Preliminary Prospectus, the Registration Statement or the Prospectus or any
amendment or supplement to the Registration Statement or the Prospectus, or the
omission or alleged omission to state in such document a material fact required
to be stated in it or necessary to make the statements in it not misleading in
the light of the circumstances in which they were made, or arise out of or are
based in whole or in part on any inaccuracy in the representations and
warranties of the Selling Stockholder contained herein or any failure of the
Selling Stockholder to perform its obligations hereunder or under law in
connection with the transactions contemplated hereby; provided, however, that
(i) the Selling Stockholder will not be liable to the extent that such loss,
claim, liability, expense or damage arises from the sale of the Shares in the
public offering to any person by an Underwriter and is based on an untrue
statement or omission or alleged untrue statement or omission made in reliance
on and in conformity with information relating to any Underwriter furnished in
writing to the Company by the Representatives, on behalf of any Underwriter,
expressly for inclusion in the Registration Statement, the Preliminary
Prospectus or the Prospectus; (ii) the Selling Stockholder will not be liable to
any Underwriter, the directors, officers, employees or agents of such
Underwriter or any person controlling such Underwriter with respect to any loss,
claim, liability, expense, or damage arising out of or based on any untrue
statement or omission or alleged untrue statement or omission or alleged
omission to state a material fact in the Preliminary Prospectus which is
corrected in the Prospectus if the person asserting any such loss, claim,
liability, charge or damage purchased Shares from such Underwriter but was not
sent or given a copy of the Prospectus at or prior to the written confirmation
of the sale of such Shares to such person and if copies of the Prospectus were
timely delivered to such Underwriter pursuant to Section 5 hereof; (iii) each
Selling Stockholder will be liable under this Section 7(b) with respect to any
untrue statement or omission or alleged untrue statement or omission to the
extent, and only to the extent, that such untrue statement or alleged untrue
statement or omission or alleged omission has been made in any Preliminary
Prospectus, the Registration Statement or the Prospectus or any amendment or
supplement to the Registration Statement or the Prospectus in reliance upon and
in conformity with written information furnished to the Company by such Selling
Stockholder specifically for use in the preparation thereof, and (iv) the
liability of each Selling Stockholder under this Section 7(b) shall not exceed
the product of the purchase price (less underwriting discount) for each Share
set forth in Section 1(a) hereof multiplied by the number of Shares sold by such
Selling Stockholder hereunder.  This indemnity agreement will be in addition to
any liability that the Selling Stockholder might otherwise have.

                                       23
<PAGE>

     (c) Each Underwriter will indemnify and hold harmless the Company, each
director of the Company, each officer of the Company who signs the Registration
Statement, each person, if any, who controls the Company within the meaning of
Section 15 of the Act or Section 20 of the Exchange Act, and each Selling
Stockholder to the same extent as the foregoing indemnity from the Company and
each Selling Stockholder to each Underwriter, as set forth in Sections 7(a) and
7(b), but only insofar as losses, claims, liabilities, expenses or damages arise
out of or are based on any untrue statement or omission or alleged untrue
statement or omission made in reliance on and in conformity with information
relating to any Underwriter furnished in writing to the Company by the
Representatives, on behalf of such Underwriter, expressly for use in the
Registration Statement, the Preliminary Prospectus or the Prospectus.  This
indemnity will be in addition to any liability that each Underwriter might
otherwise have.

     (d) Any party that proposes to assert the right to be indemnified under
this Section 7 shall, promptly after receipt of notice of commencement of any
action against such party in respect of which a claim is to be made against an
indemnifying party or parties under this Section 7, notify each such
indemnifying party in writing of the commencement of such action, enclosing with
such notice a copy of all papers served, but the omission so to notify such
indemnifying party will not relieve it from any liability that it may have to
any indemnified party under the foregoing provisions of this Section 7 unless,
and only to the extent that, such omission results in the loss of substantive
rights or defenses by the indemnifying party.  If any such action is brought
against any indemnified party and it notifies the indemnifying party of its
commencement, the indemnifying party will be entitled to participate in and, to
the extent that it elects by delivering written notice to the indemnified party
promptly after receiving notice of the commencement of the action from the
indemnified party, jointly with any other indemnifying party similarly notified,
to assume the defense of the action, with counsel reasonably satisfactory to the
indemnified party.  After notice from the indemnifying party to the indemnified
party of its election to assume the defense, the indemnifying party will not be
liable to the indemnified party for any legal or other expenses except as
provided below and except for the reasonable costs of investigation subsequently
incurred by the indemnified party in connection with the defense.  The
indemnified party will have the right to employ its own counsel in any such
action, but the fees, expenses and other charges of such counsel will be at the
expense of such indemnified party unless (i) the employment of counsel by the
indemnified party has been authorized in writing by the indemnifying party, (ii)
the indemnified party has reasonably concluded (based on advice of counsel) that
there may be legal defenses available to it or other indemnified parties that
are different from or in addition to those available to the indemnifying party,
(iii) a conflict or potential conflict exists (based on advice of counsel to the
indemnified party) between the indemnified party and the indemnifying party (in
which case the indemnifying party will not have the right to direct the defense
of such action on behalf of the indemnified party) or (iv) the indemnifying
party has not in fact employed counsel to assume the defense of such action
within a reasonable time after receiving notice of the commencement of the
action, in each of which cases the reasonable fees, disbursements and other
charges of counsel will be at the expense of the indemnifying party or parties.
It is understood that the indemnifying party or parties shall not, in connection
with any proceeding or related proceedings in the same jurisdiction, be liable
for the reasonable fees, disbursements and other charges of more than one
separate firm admitted to practice in such jurisdiction at any one time for all
such indemnified party or parties.  All such fees, disbursements and other
charges will be reimbursed by the indemnifying party promptly as they are
incurred. Any

                                       24
<PAGE>

indemnifying party will not be liable for any settlement of any action or claim
effected without its written consent (which consent will not be unreasonably
withheld).

     (e) If the indemnification provided for in this Section 7 is applicable in
accordance with its terms but for any reason is held to be unavailable other
than for failure to give notice to hold harmless an indemnified party under
paragraphs (a), (b), (c) and (d) of this Section 7 in respect of any losses,
claims, liabilities, expenses and damages referred to therein, then each
applicable indemnifying party, in lieu of indemnifying such indemnified party,
shall contribute to the amount paid or payable (including any investigative,
legal and other expenses reasonably incurred in connection with, and any amount
paid in settlement of, any action, suit or proceeding or any claim asserted, but
after deducting any contribution received by the Company or the Selling
Stockholders from persons other than the Underwriters, such as persons who
control the Company within the meaning of the Act, officers of the Company who
signed the Registration Statement and directors of the Company, who also may be
liable for contribution) by such indemnified party as a result of such losses,
claims, liabilities, expenses and damages in such proportion as shall be
appropriate to reflect the relative benefits received by the Company and the
Selling Stockholders, on the one hand, and the Underwriters, on the other hand.
The relative benefits received by the Company and the Selling Stockholders, on
the one hand, and the Underwriters, on the other hand, shall be deemed to be in
the same proportion as the total net proceeds from the offering (before
deducting expenses) received by the Company and the Selling Stockholders bear to
the total underwriting discounts and commissions received by the Underwriters,
in each case as set forth in the table on the cover page of the Prospectus.  If,
but only if, the allocation provided by the foregoing sentence is not permitted
by applicable law, the allocation of contribution shall be made in such
proportion as is appropriate to reflect not only the relative benefits referred
to in the foregoing sentence but also the relative fault of the Company and the
Selling Stockholders, on the one and, and the Underwriters, on the other hand,
with respect to the statements or omissions which resulted in such loss, claim,
liability, expense or damage, or action in respect thereof, as well as any other
relevant equitable considerations with respect to such offering.  Such relative
fault shall be determined by reference to whether the untrue or alleged untrue
statement of a material fact or omission or alleged omission to state a material
fact relates to information supplied by the Company, the Selling Stockholders or
the Representatives on behalf of the Underwriters, the intent of the parties and
their relative knowledge, access to information and opportunity to correct or
prevent such statement or omission.  The Company, the Selling Stockholders and
the Underwriters agree that it would not be just and equitable if contributions
pursuant to this Section 7(e) were to be determined by pro rata allocation (even
if the Underwriters were treated as one entity for such purpose) or by any other
method of allocation which does not take into account the equitable
considerations referred to herein.  The amount paid or payable by an indemnified
party as a result of the loss claim, liability, expense or damage, or action in
respect thereof, referred to above in this Section 7(e) shall be deemed to
include, for purposes of this Section 7(e), any legal or other expenses
reasonably incurred by such indemnified party in connection with investigating
or defending any such action or claim.  Notwithstanding the provisions of this
Section 7(e), (i) no Underwriter shall be required to contribute any amount in
excess of the underwriting discounts received by it, (ii) no person found guilty
of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act)
will be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation, and (iii) no Selling Stockholder shall be required
to contribute any amount in excess of the proceeds received by the Selling
Stockholder from the Underwriters in the offering.  The Underwriters'

                                       25
<PAGE>

obligations to contribute as provided in this Section 7(e) are several in
proportion to their respective underwriting obligations and not joint.  For
purposes of this Section 7(e), any person who controls a party to this Agreement
within the meaning of the Act will have the same rights to contribution as that
party, and each officer of the Company who signed the Registration Statement
will have the same rights to contribution as the Company, subject in each case
to the provisions hereof.  Any party entitled to contribution, promptly after
receipt of notice of commencement of any action against any such party in
respect of which a claim for contribution may be made under this Section 7(e),
will notify any such party or parties from whom contribution may be sought, but
the omission so to notify will not relieve the party or parties from whom
contribution may be sought from any other obligation it or they may have under
this Section 7(e).  No party will be liable for contribution with respect to any
action or claim settled without its written consent (which consent will not be
unreasonably withheld).

     (f) The indemnity and contribution agreements contained in this Section 7
and the representations and warranties of the Company and the Selling
Stockholders contained in this Agreement shall remain operative and in full
force and effect regardless of (i) any investigation made by or on behalf of the
Underwriters, (ii) acceptance of any of the Shares and payment therefor or (iii)
any termination of this Agreement.

     8.  Reimbursement of Certain Expenses.  In addition to its other
obligations under Section 7(a) of this Agreement, the Company hereby agrees to
reimburse on a quarterly basis the Underwriters for all reasonable legal and
other expenses incurred in connection with investigating or defending any claim,
action, investigation, inquiry or other proceeding arising out of or based upon,
in whole or in part, any statement or omission or alleged statement or omission,
or any inaccuracy in the representations and warranties of the Company or the
Selling Stockholders contained herein or failure of the Company or the Selling
Stockholders to perform its or their respective obligations hereunder or under
law, all as described in Sections 7(a) and (b), notwithstanding the absence of a
judicial determination as to the propriety and enforceability of the obligations
under this Section 8 and the possibility that such payment might later be held
to be improper; provided, however, that, to the extent any such payment is
ultimately held to be improper, the persons receiving such payments shall
promptly refund them.

     9.  Termination.  The obligations of the several Underwriters under this
Agreement may be terminated at any time on or prior to the Closing Date (or,
with respect to the Option Shares, on or prior to the Option Closing Date), by
notice to the Company and the Selling Stockholders from the Representatives,
without liability on the part of any Underwriter to the Company if, prior to
delivery and payment for the Firm Shares or Option Shares, as the case may be,
in the sole judgment of the Representatives, (i) trading in any of the equity
securities of the Company shall have been suspended by the Commission or by The
Nasdaq National Market, (ii) trading in securities generally on the New York
Stock Exchange or The Nasdaq National Market shall have been suspended or
limited or minimum or maximum prices shall have been generally established on
such exchange, or additional material governmental restrictions, not in force on
the date of this Agreement, shall have been imposed upon trading in securities
generally by such exchange, by order of the Commission or any court or other
governmental authority, or by The Nasdaq National Market, (iii) a general
banking moratorium shall have been declared by either Federal or Commonwealth of
Massachusetts authorities or (iv) any material adverse change in the financial
or securities markets in the United States or in political, financial or
economic conditions in the United States or any outbreak or material

                                       26
<PAGE>

escalation of hostilities or other calamity or crisis shall have occurred, the
effect of which is such as to make it, in the sole judgment of the
Representatives, impracticable or inadvisable to proceed with completion of the
public offering or the delivery of and payment for the Shares.

    If this Agreement is terminated pursuant to Section 9 or 10 hereof, neither
the Company nor any Selling Stockholder shall be under any liability to any
Underwriter except as provided in Sections 5(j), 7 and 8 hereof, but, if due to
any breach of this Agreement by the Company or the Selling Stockholders, the
purchase of the Shares by the Underwriters is not consummated or the Company is
unable to perform its obligations hereunder, the Company will reimburse the
several Underwriters for all out-of-pocket expenses (including the fees,
disbursements and other charges of counsel to the Underwriters) incurred by them
in connection with the offering of the Shares.

     10. Substitution of Underwriters. If any one or more of the Underwriters
shall fail or refuse to purchase any of the Firm Shares which it or they have
agreed to purchase hereunder, and the aggregate number of Firm Shares which such
defaulting Underwriter or Underwriters agreed but failed or refused to purchase
is not more than one-tenth of the aggregate number of Firm Shares, the other
Underwriters shall be obligated, severally, to purchase the Firm Shares which
such defaulting Underwriter or Underwriters agreed but failed or refused to
purchase, in the proportions which the number of Firm Shares which they have
respectively agreed to purchase pursuant to Section 1 bears to the aggregate
number of Firm Shares which all such non-defaulting Underwriters have so agreed
to purchase, or in such other proportions as the Representatives may specify;
provided that in no event shall the maximum number of Firm Shares which any
Underwriter has become obligated to purchase pursuant to Section 1 be increased
pursuant to this Section 10 by more than one-ninth of such number of Firm Shares
without the prior written consent of such Underwriter. If any Underwriter or
Underwriters shall fail or refuse to purchase any Firm Shares and the aggregate
number of Firm Shares which such defaulting Underwriter or Underwriters agreed
but failed or refused to purchase exceeds one-tenth of the aggregate number of
the Firm Shares and arrangements satisfactory to the Representatives and the
Company for the purchase of such Firm Shares are not made within 48 hours after
such default, this Agreement will terminate without liability on the part of any
non-defaulting Underwriter, the Company or the Selling Stockholders for the
purchase or sale of any Shares under this Agreement. In any such case either the
Representatives or the Company shall have the right to postpone the Closing
Date, but in no event for longer than seven days, in order that the required
changes, if any, in the Registration Statement and the Prospectus or in any
other documents or arrangements may be effected. Any action taken pursuant to
this Section 10 shall not relieve any defaulting Underwriter from liability in
respect of any default of such Underwriter under this Agreement.

     11. Information Provided by Underwriters. The Company, the Selling
Stockholders and the Underwriters acknowledge and agree that the statements set
forth under the heading "Underwriting" in the Preliminary Prospectus and the
Prospectus constitute the only information relation to any Underwriter furnished
in writing to the Company by the Representatives on behalf of the Underwriters
expressly for inclusion in the Registration Statement, the Preliminary
Prospectus or the Prospectus.

    12. Information Provided by Selling Stockholders.   The Company, the
Selling Stockholders and the Underwriters acknowledge and agree that the only
information furnished

                                       27
<PAGE>

by any Selling Stockholder to the Company for inclusion in any Prospectus or the
Registration Statement consists of the information set forth in the caption
"Principal and Selling Stockholders".

    13. Miscellaneous. Notice given pursuant to any of the provisions of this
Agreement shall be in writing and, unless otherwise specified, shall be sent by
certified or registered mail, return receipt requested, or by nationally
recognized overnight courier, (a) if to the Company or the Selling Stockholders,
at the office of the Company, Candela Corporation, 530 Boston Post Road,
Wayland, MA 01778, Attention: Chief Executive Officer, with a copy to Gordon H.
Hayes, Jr., Esq., Testa Hurwitz & Thibeault, LLP, High Street Tower, 125 High
Street, Boston, MA 02110, or (b) if to the Underwriters, to the Representatives
at the offices of Needham & Company, Inc., 445 Park Avenue, New York, New York
10022, Attention: Corporate Finance Department, with a copy to William C.
Rogers, Esq., Choate, Hall & Stewart, Exchange Place, 53 State Street, Boston,
MA 02109. Any such notice shall be effective only upon receipt. Any notice under
such Section 9 or 10 may be made by telex or telephone, but if so made shall be
subsequently confirmed in writing.

    This Agreement has been and is made solely for the benefit of the several
Underwriters, the Company, the Selling Stockholders and the controlling persons,
directors and officers referred to in Section 7, and their respective successors
and assigns, and no other person shall acquire or have any right under or by
virtue of this Agreement.  The term "successors and assigns" as used in this
Agreement shall not include a purchaser, as such purchaser, of Shares from any
of the several Underwriters.

    Any action required or permitted to be made by the Representatives under
this Agreement may be taken by them jointly or by Needham & Company, Inc.

    This Agreement shall be governed by and construed in accordance with the
laws of the State of New York applicable to contracts made and to be performed
entirely within such State.

    This Agreement may be signed in two or more counterparts with the same
effect as if the signatures thereto and hereto were upon the same instrument.

    In case any provision in this Agreement shall be invalid, illegal or
unenforceable, the validity, legality and enforceability of the remaining
provisions shall not in any way be affected or impaired thereby.

    The Company and the Underwriters each hereby waive any right they may have
to a trial by jury in respect of any claim based upon or arising out of this
Agreement or the transactions contemplated hereby.

                                       28
<PAGE>

    Please confirm that the foregoing correctly sets forth the agreement among
the Company and the several Underwriters.

                                     Very truly yours,

                                     CANDELA CORPORATION


                                     By:
                                         --------------------------------------
                                         Title:


                                     SELLING STOCKHOLDERS
                                     (named in Schedule II and in Schedule III
                                     hereto)


                                     By:
                                          ------------------------------------
                                                    Attorney-in-Fact


Confirmed as of the date first
above mentioned:

Needham & Company, Inc.
Tucker Anthony Cleary Gull
   Acting on behalf of themselves
   and as the Representatives of
   the other several Underwriters
   named in Schedule I hereto.


By: Needham & Company, Inc.


By:
    -------------------------------------
    Title:

                                       29
<PAGE>

                                   SCHEDULE I

                                  UNDERWRITERS

                                                          Number of
                                                             Firm
                                                            Shares
Underwriters                                           to be Purchased
------------                                           ---------------

Needham & Company, Inc. ............................
Tucker Anthony. ....................................
[other underwriters]. ..............................



                                                           --------
      Total ........................................
                                                           ========

                                       30
<PAGE>

                                  SCHEDULE II

                                                         Total Number
                                                        of Firm Shares
                                                          to be Sold
                                                          ----------


[Selling Stockholders].............................       ----------

     TOTALS .......................................
                                                          ==========

                                       31
<PAGE>

                                  SCHEDULE III

                                                         Total Number
                                                       of Option Shares
                                                          to be Sold
                                                          ----------

[Selling Stockholders] .............................      ----------

   TOTALS ..........................................
                                                          ==========

                                       32
<PAGE>

                                  SCHEDULE IV

                           FORM OF LOCK-UP AGREEMENT

     The undersigned, a holder of securities of Candela Corporation, a Delaware
corporation (the "Company"), is entering into this agreement (the "Lock-Up
                  -------                                          -------
Agreement") to facilitate the public offering of shares of Common Stock (the
---------
"Common Stock") of the Company (the "Offering").  In connection with the
-------------                        --------
Offering, the Company will enter into an Underwriting Agreement with the several
Underwriters listed on Schedule I to the Underwriting Agreement (the
"Underwriters"), for whom you are acting as representatives (the
-------------
"Representatives").
----------------

     In consideration of your entering into the Underwriting Agreement and in
order to induce you to act as Representatives in connection with the Offering,
the undersigned hereby agrees that he or she will not, without the prior written
approval of Needham & Company, Inc., acting on its own behalf and/or on behalf
of other Representatives of the Underwriters, directly or indirectly, sell,
contract to sell, make any short sale, pledge, or otherwise dispose of, or enter
into any hedging transaction that is likely to result in a transfer of, any
shares of Common Stock, options to acquire shares of Common Stock or securities
exchangeable for or convertible into shares of Common Stock of the Company which
he or she may own, for a period commencing as of the date hereof and ending on
the date which is one hundred and twenty (120) days after the date of the final
Prospectus relating to the Offering.  The foregoing sentence shall not apply to
(A) the transfer of shares of Common Stock by the undersigned as a gift of
gifts; (B) the transfer of shares of Common Stock by the undersigned to its
affiliates, as such term is defined in Rule 405 under the Securities Act; and
(C) the exercise of stock options granted pursuant to the Company's stock option
and employee stock or option purchase plans; provided, that, in the case of
clause (A) or (B) above, the recipient(s), donee(s) or transferee(s),
respectively, agrees in writing as a condition precedent to such issuance, gift
or transfer to be bound by the terms of this agreement and, in the case of
clause (C), any shares of Common Stock acquired pursuant to the exercise of any
such stock option shall be subject to the restrictions of this letter.

     The undersigned acknowledges the sufficiency of the consideration for this
Lock-Up Agreement.  The undersigned confirms that he or she understands that the
Underwriters and the Company will rely upon the representations set forth in
this Lock-Up Agreement in proceeding with the Offering.  The undersigned further
confirms that the agreements of the undersigned are irrevocable and shall be
binding upon the undersigned's heirs, legal representatives, successors and
assigns.  The undersigned agrees and consents to the entry of stop transfer
instructions with the Company's transfer agent against the transfer of
securities held by the undersigned except in compliance with this Lock-Up
Agreement.

     This Lock-Up Agreement shall be binding on the undersigned and his or her
respective successors, heirs, personal representatives and assigns.

                                         Very truly yours,


Date:            , 1999
     ------------                        --------------------

                                       33