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From: tomb@tekecs.UUCP (Tom Beach)
Newsgroups: net.rec.photo
Subject: copying (prints only)
Message-ID: <5715@tekecs.UUCP>
Date: Thu, 26-Sep-85 17:24:35 EDT
Article-I.D.: tekecs.5715
Posted: Thu Sep 26 17:24:35 1985
Date-Received: Sat, 28-Sep-85 19:19:28 EDT
Distribution: na
Organization: Tektronix, Wilsonville OR
Lines: 49
Xref: tektronix net.rec.photo:01580 

I'd have posted this previously but I got the impression that
you were more interested in slides. I've had several occasions to 
make black and white copies of prints or printed material,
the originals either color or B&W.

Important points in copying:

Camera MUST be parallel with the material to be copied.
	This is tougher than it sounds, particularily if you
	don't have a professional copy stand (I don't!)

Camera MUST be stable, use a tripod with the column inverted if you
	don't have a copy stand. This is clumsy but works.

Light the material with 2 floods positioned equally from the work
	at about 45 degrees from the work surface. I use
	#2 photofloods in reflectors. Reflector floods would
	work just fine.

Hold the material to be copied flat, preferably without glass
	Glass reflects the image of the camera and tends to
	get dirty. I use my enlarging easel.

Take your light reading from a Kodak neutral grey card (18% reflectance)
	or something equivalent -- *NOT* from the material to be copied.

I bracket exposure +/- 2 stops, and almost always use the center one.

Film is a function of the original, for continuous tone reproduction
	I normally use Plus-X which I process myself. For printed
	material or line drawings, use a high contrast graphic arts
	film, for color work use something consistent with your
	light sources e.g. tungsten balanced film or proper filtration.
	I would not try to use electronic flash for copy work
	without a flash meter or processing a test roll with wide
	exposure bracketing.

I have made prints (B&W) from slides by exposing 4X5 sheet film
	with the slide in an enlarger. It works fine but is time
	consuming and you'd best make some test exposures.  :-)

Hope this helps a bit.
-- 
Tom Beach

email: ..tektronix!tekecs!tomb

"The past is another country;
	they do things differently there."


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