Backlit OM lenses : coating problem ?

koraks said:

That probably explains it - at least in part. At some point during the loading operation, there was a flash of light that exposed part of the film to itself. Maybe a little status LED blinking somewhere in the room or something. It must have been quite dim, otherwise you would have had more fog. These things happen!

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It's possible. I used a changing bag, and I rolled the "sleeves" pretty high, but it took me so long to spool the film that maybe I moved in a way that allowed light to come in. I don't know if it's possible to get that kind of fogging from a light leak in camera, but I noticed that I had a few light leaks on these last 2 rolls (never happened before with this camera... I guess I'm up for a seal change...).

It doesn't look like an in-camera problem; the film never overlaps that way over itself inside a camera. I think it's probably a brief flash of light due to the changing bag creasing in an unfortunate way around the arms or something like that.

koraks said:

It doesn't look like an in-camera problem; the film never overlaps that way over itself inside a camera. I think it's probably a brief flash of light due to the changing bag creasing in an unfortunate way around the arms or something like that.

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Thank you for your insight