02/05/2026
I have just started rolling my own, from 35mm bulk film. The first test roll had long straight scratches end to end, so I thought I may have made an error in loading the cassette. 2nd roll the same cassette, same camera and same scratch lines, but I now know they are from the reusable cassette. But with this roll I have what must be a light leak. It looks like the sprocket holes may be related and these are through the whole roll.
So a question for all you knowledgable folks: is the light leak likely to be
- the reusable cassette
- my loading of the cassette (Computrol loader)
- the Computrol
- the camera, Chinon CM-4 I have used for several years and put which I suspect it is,
- or even loading into the Paterson tank (which I do several time each week but one never knows).
I have now loaded a used Kodak cartridge; no scratches and will dev that tomorrow, so will update this post then.
