Quote Originally Posted by ChrisW
Many thanks for the diagram. Being a perfectionist, I will cut and tap some 6061 T6 sheet this week end. Wait. Not this week end. Lacrosse, baseball, then another lacrosse. Next week end.
Then you won't want to shim lens boards or film carriers with tape like I do. Litho tape or clear Scotch tape doesn't compress like some other tapes. Really, it does work, and it doesn't get out of alignment easily. As for optimum aperture, a quick check with your grain focuser will tell you more than theory or your physics class would have. Sharp fine grain can get a bit fuzzy in the center of the image when a fine lens is stopped down to f/8. In theory any lens can resolve only about 200 lp/mm at f/8.