Originally posted by MrEspie When I test it with film, what exactly should I be looking for to indicate the integrity of the light seals? Or better yet, what sort of controlled shots should I take that would make slight imperfections more obvious?
Cover the lens and the viewfinder so that no light is comming in that way. Then run a film (black and white I believe works best) through the camera, a cople of shots at the time, letting it rest in bright light in between. When this part of the film is developped you will see any leakage of light comming in from the sides of the film as black shades (black on the negatives, white on copies). If there are no leaks the developed film will be compeltely clear. If the leak is small you might not easilly see it on top of real exposures, but they might still make you loose contrast. If they are large you will see shades even on the normal shots.
Sort of reminds me of a young guy (10 years?) in the youth group of the camera club in which I grew up, who came to me (by then I had advanced to "youth-leader") with the camera opened complaining "I can't see any photos on the film, why is that, is something wrong?".