--- R Duarte <ra...@rahji.com> wrote: > Hi, > > What's the focal length for a 35mm SLR with a body cap pinhole? I'm trying > to find out what size to make the pinhole.
Use a small piece of paper to measure the distance from the shutter blades of your camera to where the body cap goes. You can then go to http://members.home.net/hmpi/Pinhole/Articles/PinholeArticles.htm and read what pinhole size you will need from the Pinhole Aperture Values chart. > Also, in my bathroom-darkroom I've only dealt with developing RC paper > negatives and prints. I just made a camera that will use 4x5 film backs and > I'm wondering if I should try using Tri-X film instead of paper. Am I > correct that I have to develop the film in complete darkness? No safelight > right? If so, I guess I have to get a better timer and worry more about the > temperature of the developer - so far the developer temp has been way off > and i've been leaving paper in the developer until it looks right. I guess > that's out with film, huh? Using film will allow you to make enlargements. Since Tri-X is panchromatic, you cannot use a safelight when developing the film. Sometimes I use halftone film, which is orthochromatic, which can be developed under a safelight. Of course, you don't really have to develop in complete darkness if you use tubes. I've been using the tubes from http://www.darkroom-innovations.com/ for many years and they're about as convenient as it gets (develops evenly, can use different times for different sheets, do everything but load the film into the tubes with white lights on, etc.). Cheers - george ===== Handmade Photographic Images http://members.home.net/hmpi/ __________________________________________________ Do You Yahoo!? Listen to your Yahoo! Mail messages from any phone. http://phone.yahoo.com
