Hi!
I have been following ground glass and fresnel lens thread posted recently. I ha ve a question related to the same issue. I have a Busch pressman 4x5 camera. Foc using on this camera without cloth over your head is almost impossible. Recently i added fresnel lens in front of the ground glass i.e. the fresnel lens is on m y side with lens smooth side is facing me and, the grain side is in contact with ground glass. The image quality has improved drastically. I have not exposed an y film after this addition. I want to know if this will alter focusing accuracy in any way. Thanks
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