>>3120039You could've honestly googled this, btw. Very popular fault. If that top left corner dev tank is complete that's a way better steal than the Zenit teebeeietch. Cool find, hope you have fun using the camera, helios lenses are sharpest around f5.6/f8 and have a significant focus shift - try to focus at the target aperture, not wide open, the iq gain is visible.