Originally Posted by
Bruce Watson
I might be wrong about this, but IIRC the metalized paper bags are not guaranteed to be light proof. The cardboard boxes are. The purpose of the bags is to maintain the clean dry atmospheric conditions the film was made in. It would be disastrous for the film to get damp enough for it to stick together, and the bags' design function is to prevent that. For years of shelf storage.
In meeting that environmental protection function, it's conceivable that the bags will also be light proof, but if they are you are essentially just getting lucky.
Does this have any connection with your posted problem? Probably not. That problem looks like pin hole light leaks from your bellows to me. If that's true, you'd only likely see 'em when the sun is shining on the bellows in just the right place, at just the right angle. Which might explain why they seem to "wander" around a bit and only show up with certain scenes.
Easy to check for this by taking the camera into the darkroom, extending the bellows, stick a light in, and turn off the room light. If the bellows are completely light tight, you'll know. Else, you'll know that too. Quick and easy test.
And just because your bellows is new, doesn't mean it's immune.
Bookmarks