i have a problem that is driving me crazy. i have a problem with film fogging. i have tried different formats (4x5 and 8x10), as well as different batches of f ilm. i process my film in btz tubes. the fogging is inconsistent. generally it is in the lower part of the negative, but not in a constant area. i have even sw itched areas of film loading. i don't think it is the camera, film, or holders. could it be the btz tubes and processing? i really have no idea what the probl em is. about 50% of the time i get no fogging at all. also, i don't think it is the film loading since this is in an absolutely dark room (not even any fluores cent lights).
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