Quote Originally Posted by Ian C View Post
From post #1,

These are 5” x 7” format lenses. They can’t fully cover the diagonal of an 8” x 10” film. You need to check the diameter of the infinity-focus image circle of any lens you might choose and verify that it is large enough to properly cover the diagonal of your film size.
A very important point. The focal length of 210mm is very useful for landscape work but make sure that you choose a lens for 8x10...