Hi, I need a little help.
I have a Shen 4x5 XPO. I just installed an "inside the camera" fresnel lens. The Shen has a lip under the ground glass for holding the fresnel.
So, I pulled out the ground glass and put down some layers of tape to shim the ground glass out approximately 1/3 the thickness of the ground glass. Several threads suggested that this was the procedure, to shim "out" the ground glass a bit.
Loaded up some paper negatives and did a focus test. Used a 210mm f4.5 Fujinar.
What do you think? I this close enough? Looks slightly behind the "6" inch mark where I focused. I refocused between each shot to eliminate user error (60-year-old eyes and progressive lenses).
Should I shim a bit more, or is this OK considering that I normally don't shoot this close?