I have always scratched my head when looking at lens charts. I read that the angle of coverage for an 8x10 is 350 on one place, and 420 on another place. All I know is my 210 caltar iin does not but I really like the perspective it gives. All I have now for my 8x10 is a 300mm and want something wider.

Is there a list somewhere, that people trust, which might give me my options?

Or maybe someone has a 210 that covers 8x10 that they really like and could recommend?