Quote Originally Posted by Steve Smith View Post
This is only true if the Fresnel goes between the lens and the ground glass.
Isn't this only if you have to move the GG back to accommodate the Fresnel (i.e. so that the Fresnel is held in place by the GG) as you are changing the relationship between the ground image and the film holder?

I have several cameras with a fresnel in between the lens and the GG and there is absolutely no issue with their focus.