>>4355065And I think this one is at f/8 maybe? Full frame of slide film.
I should also point out, both of these frames are on very contrasty film; normal negative colour or bw doesn't show the vignette nearly as strongly, and on digital it's practically a non-issue.
So not perfect, but you're not paying perfect lense money for it either, and the wide angle and fast aperture make it really versatile.