WARRANTY REGISTRATION FORM

We sincerely thank you for your purchase and wish you years of pleasure using it!

Tele Vue Warranty Summary
Eyepieces, Barlows, Powermates, & Paracorr have a “Lifetime Limited” warranty, telescopes & accessories are warranted for 5 years. Electronic parts are warranted for 1 year. Warranty is against defects inmaterial or workmanship. No other warranty is expressed or implied. No returns without prior authorization.
Lifetime Limited Warranty details online: http://bit.ly/TVOPTLIFE
5-Year/1-Year Warranty details online: http://bit.ly/TVOPTLIMITED
Subscribe to our Blog for the latest Tele Vue news: https://bit.ly/TeleVueBlog
Keep For Your Records
Dealer: ________________________________ City/State/Country: ______________________
Date (day/month/yr): ______/______/________ 7.0 DeLite (EDE-07.0)



32 Elkay Drive
Chester, NY 10918-3001
U.S.A.



Tele Vue®

Please fill out, cut out, and mail form below within
2-weeks of product purchase. Please include
copy of sales receipt that has your name, thedealer name, and product name.







7.0 DeLite (EDE-07.0)______________________________________Name Last
First______________________________________
Street Address

Cut out mailing address at left, tape to envelope,insert form & sales receipt in envelope and apply
sufficient postage to envelope.

How did you learn about this product?
c Dealer c Friendc Tele Vue Blog
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______________________________________City
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Purchase Information
Dealer: ________________________________
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DeLite™ EYEPIECE INSTRUCTIONSDeLite EFS (mm)18.2mm 19.1
15mm
16.0
13mm
13.8

DeLite EFS (mm)
11mm
11.7
9mm
9.6
7mm
7.5

DeLite5mm
4mm
3mm

The eyeguard housing is made of twopieces. To loosen and move it, grasp agrip ring with each hand and twist thelower grip ring to the left. When the eyeguard is sufficiently loose you can slide
it up the barrel. To tighten, again grasp
both grip rings and twist the lower portion of the eyeguard housing to the right.

*

Thank you for purchasing a Tele Vue DeLite eyepiece. Each DeLite
model features 20mm of eye relief along with a 62° apparent field.
Based on our Delos design experience, we were able to keep thesize and weight down, while achieving the best sharpness, linearity(freedom from pincushion distortion) and ghost suppression over theentire field for any speed (f/#) telescope.
Your new DeLite eyepiece is designed for optimum viewing
whether or not you wear eyeglasses. Our unique, new, adjustable,locking eyeguard housing allows for full eye relief for eyeglass wearers
in the down position. Pulling the housing up will permit setting of theeyeguard height allowing for an ideal match between your eye andtelescope pupils. With this much eye relief available, it is importantto learn your own optimum position.
If you don’t wear eyeglasses, start with the eyeguard housing
pulled out all the way. To do so, grasp the upper rubber grip ring with
one hand. With the other hand, grasp the lower grip and rotate to the *left to loosen the assembly. Slide the eyeguard to the fully extended
position. While looking through the eyepiece, slide the eyeguard
down the barrel until you just see the full field with your peripheral
vision. Note your eyeguard height using the green indicator lines
engraved on the inner barrel. You may leave the eyeguard loose orlock its position by again grasping the grip rings in each hand andthis time rotating the lower grip ring to the right. You will also find that
this system minimizes extraneous outside light, giving you the highest
contrast for those “faint fuzzies”. The generous 20mm of eye relief
also minimizes eye lens fogging due to eye moisture in cold weather.
This eyepiece is ideal for using the Tele Vue DIOPTRX™ to compensate for eyesight astigmatism. See reverse of page for details.
DeLite effective field stop diameters:*

Be careful to avoid*unscrewing
the lower

barrel section whenrotating the eyeguard
housing.

EFS (mm)
5.3
4.3
3.2

To determine the true field in degrees for an eyepiece on any given
telescope, simply divide the field stop diameter of the eyepiece by the
focal length of the telescope (in mm) and multiply the result by 57.3
degrees (a radian).
Proper Eyeguard Positioning
Your eye pupil positioned too
far in or too far out will causeedge darkening & field loss.
Center Field

geEd

Eyelensield

F

WARNING: To avoid getting dust and dirt into
the eyepiece Do not unscrew the chrome barrel!

Ideal match for your eye pupil

Tele Vue®

Vi s i o n a r y

32 Elkay Dr., Chester, New York 10918 (845) 469-4551. televue.com@televueoptics

V08/15/20

This Eyepiece Accepts DIOPTRX™
Your telescope's focuser is used to compensate for your near- or far-sightedness; DIOPTRX™ compensates for yourastigmatism. These units attach and lock onto the tops of over twenty long eye-relief Tele Vue eyepieces toachieve the sharpest full-field viewing possible. DIOPTRX™ models are available in ¼ to 3½ diopter and arerotatable for tuning to the best orientation. Simply choose the DIOPTRX™ model that matches your eyeglassprescription for astigmatism. All lenses are multi-coated glass in anodized aluminum housings with rubber
eyeguards.
Benefits of using Dioptrx over eyeglasses
1. You're more likely to see a sharper, higher contrast image, because:
A. The Dioptrx is always completely aligned to the eyepiece optics, eliminating aberrations from adecentered mismatch of eyeglass power and astigmatic axis.
B. Dioptrx can be rotated to exactly compensate for the astigmatic axis angle in real time, since both head angle
and age can vary your eyesight astigmatic angle.
C. Dioptrx likely has better multi-coatings than eyeglasses, and certainly is better in transmission and reflection
reduction than uncoated eyeglass.
D. Dioptrx is more likely to be cleaner than eyeglasses, which may have scratches and smudges from constantuse and wear and tear.
E. Dioptrx allows seeing your normal maximum contrast that eyeglasses can diminish (remove your eyeglasses
and see how contrast improves in normal vision).
2. You're more likely to see the full field in 100° Ethos eyepieces because your eyeglasses are more limiting in"effective eye-relief".
Enter bit.ly/TVOPTDXM in browser URL bar for more info.

SFA-0001

This Eyepiece Accepts FONEMATE

If you need a convenient way to take still, video, or timelapse images through an eyepiece, use our FoneMate™
smartphone adapter. It securely clamps to compatible Tele Vue eyepieces. Smartphones as
big as the Galaxy Note 4 can be fitted to the FoneMate™.
Enter bit.ly/TVOPTFM in browser URL bar for more info.

Tele Vue®

Vi s i o n a r y

32 Elkay Dr., Chester, New York 10918 (845) 469-4551. televue.com@televueoptics

V11/01/2020
BV-DX-FM-PC-BMVIP-2010

VISUAL-IMAGING PARACORR TYPE-2

Newtonian/Dobsonian telescopes can benefit from using a Tele Vue Paracorr (Parabola Corrector) to eliminate coma in theimage. Coma is the effect that makes off-center stars appear like little comets (it becomes more apparent as stars
move closer to the edge of the field). While a Newtonian/Dobsonian telescope will benefit from the use of Paracorr, those faster than f/5.0 will see the greatest results. Stars at the edge of the field will improve so dramatically, that when using top-notch Tele Vue eyepieces an object will be equally sharp anywhere in thefield. It also prevents faint stars from disappearing at the edge of the eyepiece field. This is not only aesthetically pleasing, but it also greatly reduces the need to constantly nudge the scope to keep the object
centered in the “sweet spot.” Just insert Paracorr into your 2" focuser like a 2" Barlow (it has a 15% [1.15x]
magnification factor) and add Tele Vue eyepieces to suit your needs. It’s a recipe for perfection whencombined with Tele Vue eyepieces.
The Paracorr Type-2 allows an f/3 parabolic mirror to perform like an f/12 without it. This permits
development of a new generation of larger ladderless Dobs, with bigger, sharper fields than ever before.
Indeed, it's already been successfully applied by Mike Lockwood to his 20" f/3 and 14.5" f/2.55!
This model Paracorr is dual function: the tunable top permits positioning all Tele Vue eyepieces for
optimum performance (see eyepiece position chart on the other side), and the optical assembly can beremoved for use in an imaging system with DSLR or CCD cameras along with Tele Vue Imaging System accessories.
Enter bit.ly/TVOPTPC in browser URL bar for more info.

This Eyepiece Accepts BANDMATE™ Filters
Adding Bandmate filters to your eyepiece make nebulae "pop-out" in the field. Bandmate does this by passing selectwavelengths of light and blocking other to darken the sky and increase contrast. Several filters areavailable for 2" and 1¼" barrel eyepieces.
• Bandmate Nebustar is a a unique narrowband filter design specifically for Tele Vue as a generalpurpose nebula filter for scopes of any size. Unlike other ultra-high constrast (UHC) designs,
Nebustar blocks red wavelengths normally passed by typical UHC filters. The design eliminatesstar bloat to produce sharper, more natural looking stars along with enhanced nebulosity.
• Bandmate OIII filter enhances planetary nebulae and supernovae remnants.
• Bandmate Hβ brings out the hydrogen-beta emission lines found in hydrogen emitting nebulae.
Enter bit.ly/TVOPBM2 in browser URL bar for more info.

Tele Vue®

Vi s i o n a r y

32 Elkay Dr., Chester, New York 10918 (845) 469-4551. televue.com@televueoptics

V05MAY2022
BV-DX-FM-PC-BM

Choosing Your Eyepieces

by Al Nagler
CEO, Tele Vue Optics, Inc

MAGNIFICATION

Eyepieces determine your telescope’s magnification.
Magnification = telescope focal length ÷ eyepiece focal length
TRUE FIELD OF VIEW

Eyepieces also determine the true field you see in the sky. To calculate the true field of view that you will see (in degrees):
True field of view = (eyepiece field stop diameter ÷ telescope focal length) x 57.3
THE FIELD STOP AND APPARENT FIELD OF VIEW

The field stop is the metal ring inside the eyepiece barrel that limits the field size. It’s projected by the eyepiece so that it appears
as a circle out in space when you look through the eyepiece. The angular diameter of this circle is called the apparent field of view
(AFOV) and is a fixed property for each eyepiece design. For example, Plössl and Nagler Zoom eyepieces have an AFOV of 50º,
Panoptics have 68º, Delos have 72º, Naglers have 82º, Ethos have 100º and the Ethos-SX eyepiece has 110º.
LOW-TO-MEDIUM POWER VIEWING

For low-power viewing of large objects, or to use your telescope as a low-power finder, use an eyepiece that delivers close to the
maximum possible true field of view (note that for 1.25" eyepieces, the maximum field stop diameter is 27mm; for 2" eyepieces, it’s46mm). Then add eyepieces covering uniform increments in smaller field stops. For example, if your widest field eyepiece has a
40mm diameter field stop and you choose a decreasing increment diameter factor of 2 (which results in a 4x decrease in area size),
you’ll end up with eyepieces having field stop diameters of approximately 40mm, 20mm and 10mm. To further fill in withincremental steps, add eyepieces with approximate field stop diameters of 28mm and 14mm. Of course, avoid duplicating focal
lengths. For example, if you use a 31mm Nagler (with a 42mm field stop diameter), you would not need a 32mm Plössl (with a
27mm field stop diameter).
In general, for each field stop size, choosing eyepieces with shorter focal lengths and larger apparent fields of view will allow you to
see more detail and fainter stars. In addition, you’ll have a smaller exit pupil to better match your eyesight.
EYEGLASSES AND EYE RELIEF

If you do not need eyeglasses to correct astigmatism, don’t use them when observing. If you wear
glasses to correct astigmatism, make sure they’re multi-coated, and try to choose eyepieces thathave at least 15mm to 20mm of eye relief, to minimize any field reduction (vignetting). However,
you will find that with small exit pupils such as 1mm or less, you probably will not need eyeglasses,
and can therefore use eyepieces with less eye relief. You can use DIOPTRX instead of eyeglasses
for best performance, with Tele Vue eyepieces that accept this accessory.
EXIT PUPIL

The exit pupil is the image of the objective that is formed by the eyepiece. It’s where you place youreye to see the full field of view.
Exit pupil = eyepiece focal length ÷ telescope f/#
For reflecting telescopes, it’s best to avoid exit pupils larger than 7mm or smaller than 0.5mm. Refracting telescopes have no upper
limits on exit pupil sizes.
IMAGE AMPLIFIERS (Barlows and Powermates)

You can also choose a long focal length eyepiece with comfortable eye relief and use image amplifying lenses to increase power.
Tele Vue makes Barlows and Powermates (an improvement to the Barlow-type design) in magnification factors of 2x, 2.5x, 3x, 4x
and 5x.
PARACORR Type-2 (Parabola Corrector)

If you have a Newtonian or Dobsonian reflector that’s f/5.0 or faster, you should seriously consider using the Paracorr to eliminate
coma, so your full field eyepiece sharpness is not compromised. Paracorr also acts like a 1.15x image amplifier, so, for example, a
1000mm f/4.5 scope becomes an 1150mm f/5.2 scope. Adjust your eyepiece focal length choices accordingly. Paracorr Type-2 isfor scopes as fast as f/3.0.
HIGH-POWER VIEWING

Once you’ve selected an eyepiece set based on field stop sizes, calculate the magnifications produced with your scope. For
planetary or double star observing, you’ll want an eyepiece in at least the 150x range. For determining maximum power, a goodrule of thumb is to use no more than 60x per inch of aperture for scopes with apertures up to 6". Higher magnifications may still bepleasing but will not likely reveal any additional detail. Realistically, the atmosphere will usually limit your planetary observing to a
maximum magnification of about 300x, no matter how large your telescope aperture.
Basically, you’ll be choosing low and medium power eyepieces by field stop increments to "frame" the subject, and high power
eyepieces by magnification increments (based on your scope’s aperture), to reach the optimum contrast and resolution for viewing
planets and double stars.
Check out www.televue.com for the following related articles: "Choosing Your Telescope's Magnification", “Eyepieces for Small
Dobs” and “Determining When To Use Eyeglasses”.
For more individual advice on specific applications, you can always call Tele Vue at 845-469-4551
ChoosingYour…doc

Tele Vue Optics, 32 Elkay Drive, Chester NY 10918 845-469-4551

Rev: 10/17/2012

TELE VUE EYEPIECE SPECIFICATIONSTele Vue recommends choosing low and medium power eyepieces in ratios of field stop diameters. For example, factorsof 1.4 or 2.0. When choosing higher power eyepieces, use ratios of magnification.
Focal
Length(mm)

Type

Product CodeApparent
Field (deg)

55
41
31
35
21
22
27
17
17

PlösslPanoptic
Nagler 5
Panoptic
Ethos
Nagler 4
Panoptic
Ethos
Nagler 4

EPL-55.0
EPO-41.0
EN5-31.0
EPO-35.0
ETH-21.0
EN4-22.0
EPO-27.0
ETH-17.0
EN4-17.0

50
68
82
68
100
82
68
100
82

40
32
24
13
16
19
25
17.3
18.2
10
13
14
20
11
15

PlösslPlösslPanoptic
Ethos
Nagler 5
Panoptic
PlösslDelos
DeLiteEthos
Nagler 6
Delos
PlösslApolloDeLiteEPL-40.0
EPL-32.0
EPO-24.0
ETH-13.0
EN5-16.0
EPO-19.0
EAP-25.0
EDL-17.3
EDE-18.2
ETH-10.0
EN6-13.0
EDL-14.0
EAP-20.0
EAL-11.0
EDE-15.0

43
50
68
100
82
68
50
72
62
100
82
72
50
85
62

12
13
10
15
9
11
9
11

Delos
DeLiteDelos
PlösslNagler 6
DeLiteDeLitePlösslEDL-12.0
EDE-13.0
EDL-10.0
EAP-15.0
EN6-09.0
EDE-11.0
EDE-09.0
EAP-11.0

72
62
72
50
82
62
62
50

8
6
8
7
4.7
6
7
3.7
5
8
4.5
5
3.5
3.5
4
3

Ethos
Ethos
Delos
Nagler 6
Ethos SX
Delos
DeLiteEthos SX
Nagler 6
PlösslDelos
DeLiteNagler 6
Delos
DeLiteDeLiteETH-08.0
ETH-06.0
EDL-08.0
EN6-07.0
ETH-04.7
EDL-06.0
EDE-07.0
ETH-03.7
EN6-05.0
EAP-08.0
EDL-04.5
EDE-05.0
EN6-03.5
EDL-03.5
EDE-04.0
EDE-03.0

100
100
72
82
110
72
62
110
82
50
72
62
82
72
62
62

6-3

Nagler Zoom

ENZ-0306

Field Stop Dia.
(mm)

Eye Relief(mm)Dioptrx
Ready

Pupil size in mm for various f/ratio telescopes
f/4.5
f/5.2
f/7
f/10
f/14

2" Eyepieces for Wide True Fields
46.0
46.0
42.0
38.7
36.2
31.1
30.5
29.6
24.3

38
27
19
24
15
19
19
15
17

Y
Y
Y
Y
Y
Y
Y
Y
Y

12.2
9.1
6.9
7.8
4.7
4.9
6.0
3.8
3.8

10.6
7.9
6.0
6.7
4.0
4.2
5.2
3.3
3.3

7.9
5.9
4.4
5.0
3.0
3.1
3.9
2.4
2.4

5.5
4.1
3.1
3.5
2.1
2.2
2.7
1.7
1.7

3.9
2.9
2.2
2.5
1.5
1.6
1.9
1.2
1.2

Y
Y
Y*
Y
N
Y*
N
Y
Y
Y
Y*
Y
N
Y
Y

8.9
7.1
5.3
2.9
3.6
4.2
5.6
3.8
4.0
2.2
2.9
3.1
4.4
2.4
3.3

7.7
6.2
4.6
2.5
3.1
3.7
4.8
3.3
3.5
1.9
2.5
2.7
3.8
2.1
2.9

5.7
4.6
3.4
1.9
2.3
2.7
3.6
2.5
2.6
1.4
1.9
2.0
2.9
1.6
2.1

4.0
3.2
2.4
1.3
1.6
1.9
2.5
1.7
1.8
1.0
1.3
1.4
2.0
1.1
1.5

2.9
2.3
1.7
0.9
1.1
1.4
1.8
1.2
1.3
0.7
0.9
1.0
1.4
0.8
1.1

Y
Y
Y
N
Y*
Y
Y
N

2.7
2.9
2.2
3.3
2.0
2.4
2.0
2.4

2.3
2.5
1.9
2.9
1.7
2.1
1.7
2.1

1.7
1.9
1.4
2.1
1.3
1.6
1.3
1.6

1.2
1.3
1.0
1.5
0.9
1.1
0.9
1.1

0.9
0.9
0.7
1.1
0.6
0.8
0.6
0.8

Y
Y
Y
Y*
Y
Y
Y
Y
Y*
N
Y
Y
Y*
Y
Y
Y

1.8
1.3
1.8
1.6
1.0
1.3
1.6
0.8
1.1
1.8
1.0
1.1
0.8
0.8
0.9
0.7

1.5
1.2
1.5
1.3
0.9
1.2
1.3
0.7
1.0
1.5
0.9
1.0
0.7
0.7
0.8
0.6

1.1
0.9
1.1
1.0
0.7
0.9
1.0
0.5
0.7
1.1
0.6
0.7
0.5
0.5
0.6
0.4

0.8
0.6
0.8
0.7
0.5
0.6
0.7
0.4
0.5
0.8
0.5
0.5
0.4
0.4
0.4
0.3

0.6
0.4
0.6
0.5
0.3
0.4
0.5
0.3
0.4
0.6
0.3
0.4
0.3
0.3
0.3
0.2

1¼" Eyepieces for Wide True Fields
27.0
27.0
27.0
22.3
22.1
21.3
21.2
21.2
19.1
17.7
17.6
17.3
17.1
16.2
16.0

28
22
15
15
10
13
17
20
20
15
12
20
14
18
20

1¼" Eyepieces for Medium Powers
15.0
13.8
12.7
12.6
12.4
11.7
9.6
9.1

20
20
20
10
12
20
20
8

1¼" Eyepieces for Higher Powers
13.9
10.4
9.9
9.7
8.9
7.6
7.5
7.0
7.0
6.5
5.6
5.3
4.8
4.4
4.3
3.2

15
15
20
12
15
20
20
15
12
6
20
20
12
20
20
20

1¼" Zoom Eyepieces for Medium and Higher Powers
50

5.1-2.6

NOTE: True Field in degrees = (Field Stop dia./Telescope Focal Length) X 57.3°

10N

1.3-0.7 1.2-0.6 0.9-0.4 0.6-0.3 0.4-0.2*Indicates additional Dioptrx Adapter required

As of January 2012, all Tele Vue eyepieces have a limited lifetime warranty.

Tele Vue®

Vi s i o n a r y

32 Elkay Dr., Chester, New York, 10918 (845) 469-4551 televue.com