Quote Originally Posted by StoneNYC View Post
But thanks, all those pages are too complicated for me, I looked at it and was like, "yea no.." Lol
Maybe you need to stop typing and read the material. It's really very basic and well explained. Yes, the measurement is between the film and lens planes, but as you say being really precise or accurate isn't really necessary. Jim's "cut-out thing" is in more than one of those links. They may be round instead of square, but same thing.