Quote Originally Posted by jcc View Post
I have an Industar-37 300mm f/4.5 it doesn't cover 8x10" though.
It seems like it should come pretty close if it really is a Tessar design, right? At the usual 55 degree coverage angle, I get an image circle of about 306 mm, *just* short of covering 8x10 at infinity. Is that about what you're seeing with yours, or does it have narrower coverage than usual?

If it's close at infinity, the OP would probably be fine using it at portrait distances.