tomb@tekecs.UUCP (Tom Beach) (09/27/85)
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."