Quote Originally Posted by walter23 View Post
Anything from 4x5 to 8x10 is LF (and the 6xX panoramic backs when used on a view camera can be considered LF as well). Anything larger is ULF. That's the absolute truth, the words and definitions are 100% unambiguous, and there is no element of interpretation possible.
So, by your definition, 2 1/4 x 3 1/4 sheet film, and 3 1/4 x 4 1/4 sheet film are not Large Format at all but medium-format, even though they are sheet-film?