armphoto
Established
Take the back off the Fed2 with film out of course. Take the lens off & point the camera at a bright surface, TV screens are excellent. Trip the shutter at different speeds & watch the curtain travel. Pay attention at 1/ 60th. Fed 2s especially in my experience & what I've read are prone to show capping at 60th of second. Then shine a flashlight through the curtains to see any pinhole leaks. Good luck. Fed 2s are fine camera's.
Thanks but what's capping?