Beseler 23C negative carrier: glass or not?
Mike Sibley
negatives. Dual plate glassless carriers are available as well as
carriers with glass. Which is better? Do the glass carriers hold the
negative flatter? Are there any disadvantages?
I would like to use the carrier for 6x6 and also possibley 6x9 (when I
get money for a Fuji GW690). Will a glass 6x9 carrier work well with
6x6 negatives? What about a glassless carrier?
All help greatly appreciated.
Bob Salomon
wrote:
All enlarging lenses, regardless of brand - focal length or design, were
manufactured under the assumption that they would be used with a
critically aligned enlarger and a glass carrier. the lens manufacturer
expects the film to be as flat in the enlarger as it was in the camera
(cameras do have pressure plates to accomplish this) and to remain in
the same position throughout the exposure.
If you want to obtain maximum performance from your lens use a glass
carrier with an aligned enlarger.
Richard Knoppow
"Mike Sibley" <nad...@cox.net> wrote in message
news:3E1C335E...@cox.net...
popping as they warm up. OTOH, it gives you four more
surfaces to keep clean and can have problems with Newton's
rings, an effect of diffraction where surfaces are very
close but not quite in contact. So, you can choose to have
warping negatives or dust to bother over:-) I have both
kinds of holders for my enlarger.
--
---
Richard Knoppow
Los Angeles, CA, USA
dick...@ix.netcom.com
Michael A. Covington
"Bob Salomon" <bobsa...@mindspring.com> wrote in message
news:bobsalomon-F0794...@reader0900.news.uu.net...
> If you want to obtain maximum performance from your lens use a glass
> carrier with an aligned enlarger.
One might add that this is more of an issue with larger formats than with
35-mm.
I've used both kinds. With a glass carrier, you have to keep dust off of
four surfaces (2 glass and 2 sides of the film), rather than two. But once
you get rid of the dust, it stays gone -- dust can't settle on the film
during the exposure.
Leonard Evens
I've done quite a lot of medium format enlarging with a Beseler 23C,
although not recently. I've done 6 x 6, 6 x 7 roll film , and 6 x 9
sheet film. I've done it both ways, and I don't think I noticed any
significant difference. Of course you should use a glass carrier for
optimal flatness, but the glassless carriers keep the film pretty flat,
probably almost as flat as the film lies in the camera. Also, if you
stop down, that can to some extent compensate for small variations in
film position.
--
Leonard Evens l...@math.northwestern.edu 847-491-5537
Dept. of Mathematics, Northwestern Univ., Evanston, IL 60208
Jeff Novick
This is what I find using the 23CII enlarger. Without a doubt, a glass
carrier is the best thing to use if you want sharp negs from corner to
corner. Anti-Newton glass will eliminate any rings, but, you can use an
ordinary glass carrier and there are ways of avoiding the rings. Cleaning is
always going to be more work than not using glass, but, a little spotting
doesn't bother me. You can use a larger sized carrier (ex., 6x9cm) with
smaller negs and crop. I do it all the time.
As far as glassless carriers go, Beseler makes 2 different ones. The one
that I find is superior to the other doesn't have the spring hinge and
allows the negative to be held flatter because there is no spring that wants
to separate the 2 halves of the carrier. I think this is an older model as
all the newer ones I've seen are spring hinged. 35mm is more of a problem
because the film often tends to curl.
There is also a Negatrans which holds an uncut strip of negatives. I believe
they come in glass and glassless.
Jeff
"Mike Sibley" <nad...@cox.net> wrote in message
news:3E1C335E...@cox.net...
Rich Shepard
> I would like to use the carrier for 6x6 and also possibley 6x9 (when I
> get money for a Fuji GW690). Will a glass 6x9 carrier work well with
> 6x6 negatives? What about a glassless carrier?
I can't address the question of glass versus air because I have only
glassless negative carriers. I've not had a problem -- so far -- with focus
and flatness.
But, what I just learned about 6x9 format is that there are two sizes. One
is the 6x9 image on a 120 roll of film. The other is the nominal 6x9 with
cut film for 2-1/4x3-1/4" cameras. The latter is slightly (0.5 cm) narrower
than the former. If you have the wrong size carrier the film won't sit
properly between the pins.
Rich
Jim Phelps
I have a 23CII and both the universal anti-newton ring glass and both
35mm and 2 1/4 glassless carriers. There are advantages and disadvantages
for both.
Glass:
Pro - Flat negatives, very help if you are using contrast mask or
sandwiching negs (keeps everything in registration)
Con - Newton rings even with AN glass (only one surface is stippled to
provide the AN capability, but some modern films are so smooth they cause
rings with the other (lower) surface), 6 surfaces to keep spotless (not the
four previously mentioned, 4 glass (both top and bottom) and 2 neg)
Glassless:
Pro - 2 surfaces to keep clean, less chance of neg scratches, able to use
Edwal No-Scratch and the like without too much mess
Con - Neg is not as flat, but the carrier does a good job of keeping it
almost flat. Heat popping is not too much of an issue if you're using heat
absorbing glass. The light path on the 23C is long and there's a lot of
glass in the way, assuming condenser illumination.
As you may begin to see, there's really a need for both - eventually. I use
the glass carrier for really critical and large enlargements. I use the
glassless for workprints and general printing. When using the glass
carrier, you can always cut and use masks for the different formats with the
Universal carrier. Make sure the cutout is in the middle, and adjust your
head height if appropriate.
Jim
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