I just bought a FED-2b (type 2), with two lenses (Industar 63M, Jupiter-8), from a seller here. I put a test roll though it yesterday and am loving it. When I got it in the mail, I thought the viewfinder window was horrendously blurry and tried to clean it, only to be disappointed. THEN I realized I hadn't adjusted the diopter. Wow! I can see!
Terry, how did you adjust the diopter? I have the same camera (i believe - it's a Fed 2 but not sure if it's 2b, c, d, etc.) ... but my impression of the viewfinder is the same as your initial impression.