Am I experiencing exposure issues?

[ColSebastianMoran]

That's prety much what I do except I expose the frame the camera is on when sat for a few days. This enables you to realign the film in exactly the same position after development to see where the light is coming from.

I think the leak is from the hinged door onto the take-up spool where, on a GSN, the film is wound emulsion side out. It will affect the frame two shots ahead of the one in place when the leak occurs.

I think I see... You're saying, expose the frame in the middle, after leaving the camera in bright light. Yes, that sounds good.

 

[Frontman]

Replacing the seals should be SOP for any used camera. Even if the original seals still look okay, they shrink and compress with age, and can allow light to enter. If you look around, you can find the correct seal material. It is simply adhesive-backed foam rubber, 1.5mm thick. A single sheet costs about $5, and has enough material to reseal a dozen or so cameras. A paper cutter is the best tool to use to cut out your sells, but ordinary scissors will do the job if you are careful.

 

[ColSebastianMoran]

A paper cutter is the best tool to use to cut out your sells, but ordinary scissors will do the job if you are careful.

Frontman, I think the sewing people have the best solution... Get a rotary cutter and the plastic cutting mat designed for this at any sewing store. These are really terrific, with a straight-edge guide, for cutting narrow strips of material.