"The Fokker" looks like something obscuring the lens - the case, edge of the window etc. Of the others, they all show the shutter not running evenly and smoothly. As Dralowid says, it needs work. Probably nothing beyond a CLA but it certainly looks to need that. It would be no shock to find a FED 2 that has not been serviced in its long life.
If you have access to a CRT computer monitor or TV (nowadays getting rarer, I know) try the CRT test. Using, if possible, a blank white raster on the screen, remove the camera lens and back and view the raster through the shutter, whilst firing it. At speeds of 1/60-1/500th you should see diagonal stripes of light and these should have parallel sides. If they taper at the top or bottom the curtains are running at different speeds. You may well be able to see other defects this way, rather obviously you'll see if there's no exposure. Also, try firing the shutter on "B" while looking through it. Again, it may be obvious that it doesn't run properly. There should be a kind of "clip-clop" sound to it as you press and release.
The next step is to decide if you want to tackle the work yourself or get a professional to do it. The FED 2 is a fairly simple camera but you'd need some basic tools, some confidence and to be comfortable working with small mechanical parts.
Zorki: 1e (x2), 2C, 3M, 4, 4K, 5, 6
FED: NKVD, 1g, 2e, 3a, 3b, 4L (x2), 5B, 5C
Kiev 4, 4A
Yashica Minister III
Zenith C, Zenit C, Zenit E
Minolta XG M, Z1
"The way to see by faith is to shut the eye of reason."- Benjamin Franklin
Last edited by wolves3012 : 10-25-2012 at 07:01.