What can be the flange focal distance of a 20 mm Cinor lens of a 9.5 mm camera (Pathé National II) ?
The thread diameter of the mount is the same as the D-mount (15.88 mm), but the flange focal distance seems to be the same as the C-mount (17,526 mm).
Can I use a C-mount lens (with a D-mount > C-mount adapter ring) on a 9.5 mm camera ?
Mechanically, yes, but optically ?