Having a problem with ground glass. Got a fine ground glass for my 4x5 press view. I replaced the old glass which was a coarser grain .But now my images seem ever so slightly soft as though I missed in focusing with my magnifier. Dug out an old micrometer and checked thicknesses. Itís been so long since I worked with a micrometer and I probably have the wrong readings but there is a difference between the glass the old read about .013 and new glass .005. It is only a tiny difference if my measurements make no sense But would it be enough to throw my focus off a hair?
I have a 150mm F/5.6 Topcor which gave me good results on my monorail,but I can't carry that into the field.
Hi, the thickness doesn't really matter, as long as the ground side of the glass is at the same position as before.
Jon Shiu is correct. Are you sure you've got it on the right side?
Originally Posted by rmolson
I checked that part ,next I suppose will be to check if the film plane and the ground glass agree.the camera while all metal is 50 years old and I suppose something could have changed since then.
I havent used a LF in some time, but could it be just the difference in contrast between the fine and coarser glass? Just a thought.