I have a Graphic View II 4x5 and while my shots have not been terribly blurry, they haven't been terribly sharp either. I decided to measure the difference between the ground glass and film plane with a film holder installed, and was shocked to see that the ground glass needed to be shimmed back by a full 1mm! After reading about the topic I found that some cameras require the fresnel lens to be in front of the ground glass (closest to the lens), whereas some cameras require the fresnel to be behind the GG (closest to the photographer). My camera was set up so that the fresnel was behind the lens, and the fresnel is roughly 1mm (maybe a bit more) in depth. I am wondering perhaps if the previous owner of my camera had the fresnel/GG installed incorrectly. Does it make sense that the ~1mm difference would be attributed to the fact that the fresnel should have been placed in front? I guess I have some test shots to make but I just wanted to ask first.