FallisPhoto
Veteran
I know nothing about what is casuing your problem, but I have the same camera. This is a very similar shot, and I have a little of what you have:
The film mask in your camera has shiny edges, or at least they are not as flat as they should be. That is what's making the lines around your photos. For those who don't know, the film mask is the big rectangular hole you look through to see the back of your lens.
charjohncarter
Veteran
Fallis, thanks!!!!