I have trouble loading film 120 format into my cameras. I always seem to get edge fog, sometimes right into the frame, which ruins the neg. I keep the roll tight, I think, and load in "subdued light" as the instructions say. How subdued is "subdued light"? The fog is at the start of the film so I know it is when I load. Does anyone else have this problem, any hints? Don't really want to carry a changing bag as some of my cameras are tricky to load. My 120 cameras are Pentax 645, Voigtlander Bessa 1, roll film backs for Linhof and Graflex.