I got some scans of a roll of film back from the lab and I've noticed that I've got a lighter edge on the image below. I've also noticed this on a negative shot with the same body and lens (spotmatic SPII and takumar 55 f2) that I wet printed and developed myself so I don't think it's the lab. I believe that I've seen the same thing happen when the same lens was mounted on a dslr but now that I think about it, I was using it to digitise negs shot with the spotmatic. What could be causing this? It doesn't happen on every frame, though due to the nature of the images it can be harder to tell if it has actually happened or not. Based on the shape, location and lack of colour issues I assume there's something wrong with the shutter at certain speeds. I don't have the negatives at hand so I can't provide a shot of the negatives themselves until I organise picking them up but perhaps late tonight or maybe tomorrow I can get a photo of the older affected negatives..