Lens Mount and F/No. Information

Lens Mount Information

C-mount Thread: 1″ – 32
CCD Lens Mount: M12 P=.5
Leica Screw Mount Thread: M39 P=1.0
Pentax Screw Mount Thread: M42 P=1.0
RMS Microscope Thread: 800-36 AMO
T-mount: M42 P=0.75

F/No. Lens Information

F/no. = 1/2na
F/no. Focal length/Entrance Pupil dia.