please confirm are the rebates at the edges of film fogged or clear if they are ok it means the shutter rather than body/back...
Originally Posted by Dkirk
the shutter could be running uneveningly or capping badly on my phone difficult to tell but looks like uneven running.
the distinction is made if the fogging is obscuring the image it is capping if the image is more dense it is uneven running.
the shutter might leak at either end of its run check by pointing camera at light for leak
probably lube turned to gum if uneven run and unless you have experience a pro service person necessary sorry.
Capping could be anything
if the edge rebates are fogged you need a dark room or changing bag to localize problem I'll tell what I'd do if you confirm edges fogged.