Hey Dudes...i cam across this awesome Schneider Optivaron, with an unusual mount. The thread is the same as M42 but it has a long barrel, so I am not sure what camera (possibly film camera) this lens made for. Its not a C mount, and the rear side of the lens diameter is equivalent to standard 35mm film camera lenses.
I am trying to hook this up with a Panasonic AF m43 but so far, because of the M42 lens converter I have, makes this lens barrel way too close to the sensor...so everything is out of focus and range..
if you have any suggestion, i would really appreciate it