RCA camera
C mount lenses were q uite common for the 16mm amateur and
professional cameras for a long time, and Cmount is still in some use these
days on video cameras by a number of manufacturers. It's a screw-thread
thingy, not a bayonet.
I've been looking for a source of C mount lenses for my own Panasonic
WV1410, but I havent had time to get down to serious scrounging yet.
You can also buy Cmount to <something else> adapters which will permit
using such things as SLR lenses on your WV1410. most of these introduce
lens extension, which limits the infinity-focus of the camera, but infinity
focus is not a consideration on a copy stand.
The king of adapter sources is Spiratone, but I've been busy and haven't
had time to chase the artricles down exactrly.
Many lenses for those ol' 16mm projectors are Cmount, too, and they're
mostlyoptimized for flat-to-flat reproduction, which the Panasonic lens is
definitely not.
A projection lens is sposes to take flat field things and render them flat
on projection. The one on the camera as supplied (to me!) has serious
curvature of field and vignetting. I call it the Bluromat.