From: hintzman@hpljah.hpl.hp.com (Jeff Hintzman)
Subject: Re: Bessler 23c non flat negs
Date: Wed, 16 Dec 1992 16:37:51 GMT
Reply-To: hintzman@hpljah.hpl.hp.com
Organization: HP IC Business Division R&D, Palo Alto, CA

In article <ALC.92Dec15093303@gdstech.GRUMMAN.COM>, alc@gdstech.GRUMMAN.COM (Al Chang) writes:
|> In article <Bz9v1E.51A@cup.hp.com> markt@cup.hp.com (Mark Thompson) writes:
|> 
|> 
|>    I picked up a beseler 23c about six months ago and have been fighting this
|>    problem, thoght i would throw it out there.
|> 
|>    It is a 23cXL fairly recient model.  The negitive carier has four large
|>    centering pins that have a grove in them that the edge of the neg goes into.
|>    The problem is that when the carrier is closed the neg is not heald totaly
|>    flat.  I have to be really careful not to touch the carrier after focusing
|>    or the neg will move and end up out of focus.  This has lead me to think
|>    about getting a negatrans.  It would be nice anyway for making working prints
|>    rapidly (if any one has one for sale [35mm] let me know). I would really like
|>    to know what experiences people have had with these carriers.
|> 
|> 
|> There are two different problems stated in you posting: problem
|> knocking the neg. carrier and the negative not being flat.
|> 
|> With most enlargers if you touch the carrier it will knock it out of
|> focus along with the composition. The problem with the Beseler 23/45's
|> is that there is a 2 inch arm on the carrier that sticks out of the
|> enlarger. Now with the negtrans, there is more sticking out. (Isn't
|> there a mechinism to crank the negative?) I just got use to it
|> 
|> Just my $.02 worth, but I don't think a negatrans will help it you 
|> have a tendency to hit the carrier after you focus since it the
|> carrier is held down the same way for both. (Take that comment like
|> most with a grain of salt since I don't own a negatrans.)
|> 
|> With Beseler 35mm full frame carrier, there is less surface
|> held down than the 'standard' 35mm therefore the negative is curved
|> more. If you have the full frame, you may want to check out the
|> 'standard' 35mm. Also, you should alway try to stop down as much as
|> possible I normally expose at about f8 - f11 to compensate for the
|> film being curved. There is only two ways that I know of that you can
|> get a flat negative, a carrier that uses glass or a carrier that has
|> fingers that pulls the negative flat. (Like what the use on a beseler 
|> 4x5 negative carrier.) 

Are the glass carriers made for the 23c?  I wouldn't expect them to be
cheap with anti-newton glass, but I've never seen any.  I see some of
the same problems with my 23c, and they only get worse with my 6x6cm
negs.  The only thing that saves me is that the $#@! light source is so
bright (condenser model) that I'm always printing at f/11 or f/16.

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Jeff Hintzman                                  hintzman@hpljah.hpl.hp.com
Hewlett-Packard Integrated Circuit Business Division 
Palo Alto, CA                                              (415) 857-7616
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Newsgroups: rec.photo
From: ian@rats.demon.co.uk ("Ian A. Young")