I have this really nice lens that came with my Keystone camera, but the grease had solidified and someone had gotten to it before I had a chance to work my magic. Can someone give me the overall length of the lens at 2', 6', and infinity settings in mm. Hopefully I can adjust the screw stop so the lens will focus correctly at all distance settings. Currently all frames are out of focus at all distances settings on the barrel. Using a caliper the current lens lengths are . . .
2' setting = 45mm
6' setting = 44mm
Infinity setting = 43.5mm
When I had the lens disassembled I started with the guide blocks flush with the top of the channels. Obvoiusly there are many places I could start when initially setting the blocks position. Thanks in advance. Dann