I'm trying to identify a likely cause of a strange line which seems to crop up occasionally in some of my shots.
From my limited experience, it looks like a light leak, however it doesn't seem to be a permanent one as not all shots are affected.
When it does come up, it's usually in the same spot, and often only on longer exposures.
My best theory is that the shutter is sticking slightly, but as I've not been doing this for very long, I would be grateful for any advice or insight.
I've attached some affected images.
To add a little more detail, this was taken on a Fujica ST705 which has a cloth focal plane shutter. I've investigated the body for light leaks, and cannot find any obvious ones.
When I store the camera while not in use, it lives in my camera bag which is very dark and made of thick canvas so quite good for light insulation.
As I was asked in one of the comments, my practice when using the camera is normally to wind the film on after taking a shot, and if the camera won't be used for a while, I lock the shutter release.
I can't remember exactly which sep-sure settings I used on the two shots, but for the first, I would guess that I set to f11 (North Wales on a slightly dull day), and shot at 1/60, and the second was likely f4 at 1/30, but that is a guess based on how I would approach the same situation now. Considering that both shots are underexposed though, it's entirely possible that my exposure time was shorter - I've not been doing this for very long, and I'm certainly not discounting the possibility that this issue is down to my own mistake.