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- Path: sparky!uunet!charon.amdahl.com!pacbell.com!ames!ncar!vexcel!copper!aspen.craycos.com!sog
- From: sog@craycos.com (Steve Gombosi)
- Newsgroups: rec.photo
- Subject: Re: Setting up a darkroom...
- Keywords: fogging, developers, darkroom, old enlargers
- Message-ID: <1992Nov16.225959.6900@craycos.com>
- Date: 16 Nov 92 22:59:59 GMT
- References: <1e8meuINNlt8@uwm.edu>
- Organization: Cray Computer Corporation
- Lines: 79
-
- In article <1e8meuINNlt8@uwm.edu> dannmann@csd4.csd.uwm.edu (Daniel Harley Wagner) writes:
- >Howdy, networld. I just finished making purchases to round out a darkroom
- >at my home. Now I have some questions about how to go about starting
- >working in it.
- >
- >I purchased a used Opemus IIa enlarger, made in Czechoslovakia, probably
- >before I was born. (judging from the yellowing of the warranty and the
- >style of the typography..) This enlarger seems to have been set up to
- >enlarge 2.25 x 2.25 negatives, which might have suited when it was new, but
- >causes me to have a minor headache. While the negative carrier has glass
- >plates in it to hold a 35mm negative with, the lens isn't exactly suited to
- >larger enlargements. (With the head at the top of the pole, I can MAYBE make
- >a little smaller than an 8x10 enlargement, with no room for cropping.) The
- >lens is currently a 75mm lens.
-
- Yup, you need a 50mm lens.
-
- >Unfortunately, I do not have the dimensions of the bayonet at hand right
- >now, but does anyone know if I can buy a smaller lens for this enlarger?
- >(has anyone HEARD of it?) Also, somewhere along the line before I purchased
- >it, someone made a different lensboard for it, but no lens. Could I just
- >purchase a 50-55mm lens that fits the new mount and attach it to the
- >enlarger? Or would I have to worry about the different focal lengths? (if
- >so, would it just be a simple fix, or would I have to whip out the tired old
- >physics text?) Oh, and if this is any help: The lenses they mention in the
- >manual are made by/called "Belar".
-
- Bayonet??? I would hope that your enlarger uses a standard 39mm screw thread.
- If it does, you should be able to use any 50mm enlarging lens. You may have
- to get a 39mm jam nut to hold it to the new board. Take it down to your
- friendly local camera store and ask.
-
- >On to the chemistry side of my questions.
- > I purchased a gallon bottle of Ilford Universal Paper Developer and a
- >half-gallon of Ilford Universal Fixer. When I purchased the enlarger, the
- >seller tossed in some old chemistry. While I don't plan on using the old
- >dektol/d-76, etc, there was a bottle of kodak indicator stop bath. Since
- >this is mostly acetic acid and an acidity indicator of some sort, I don't
- >figure it would go bad. My question is: Will this work with the Ilford
- >chemicals I am using, or will I need to shell out a few bucks for the
- >genuine Ilford chemie? (or can I be cheap and use a water stop?)
-
- Go ahead and use the Indicator Stop. You need to be *sure* that development
- has stopped before you fix, if you don't you'll get staining. Some people
- have good luck with a water stop, but I just don't trust it (especially since
- the developer concentration in the water will increase as you process - unless
- you change the water frequently). I use Ilford paper developer, Kodak Indicator
- Stop, and Kodafix. It works fine.
-
- >
- >Assorted other stuff that might cause problems:
- >A computer with green LED on top of it to indicate power. (low wattage, I'm
- >sure..)
-
- Yeah, but Multigrade is somewhat green-sensitive. I'd put some black electricians
- tape over the LED just to be safe.
-
- >2 flourescent "bulb-style" fixtures in the ceiling fan, which tend to have
- >an afterglow.
-
- This could be a problem - as I recall, not all of the afterglow from
- fluorescents is in the visible portion of the spectrum. If they're emitting
- UV, you're in *big* trouble. Any chance you could:
-
- a) remove them while you're printing, or
-
- b) cover them with something opaque?
-
- >
- >
- > Thanks-
- > Dann
- >
- >P.S. Should I leave the ground glass in the enlarger, or should I take it
- >out? What's the advantage either way? Thanks.
-
- It's probably there to diffuse the illumination a bit - it's possible
- you may get uneven exposures without it.
- I'd leave it in.
-