>>2663141My lens isn't scratched. I think the dark corners are due to 2 things:
1. the lens shooting wide open (2.8)
2. the fact that the center is where the light is coming from and either side contains dark woods
Lots of things can cause the photo to have dark edges. Most often it is due to the lens shooting wide open, you often get vignetting in that situation.
Stylus Epic / MJU II on Ilford HP5