This is a mount replacement for the Krasnogorsk-3 camera. It allows you to use B4 broadcasting lenses (like the Fujinon zooms) onto your K3. It replaces the stock M42 mount completely, which has to be unscrewed.

Installation:
After removing the removing the supports from the print, unscrew the M42 mount from the camera, put the newly printed mount in the correct orientation (example photo above) and screw it in. There are five screw holes in the mount even though the original one is screwed in by only four. You can simply ignore the fifth hole and screw the four screws in that came with the camera. Then you're good to go!

There are two versions of the mount, one with and without holes for the screws, because the screw positions are not 100% accurate and might not work for everyone. I was able to screw it into my camera just fine. I also designed a body cap to go with the mount, which you can find in the download.

The mount's flange distance is longer than it should be, this is by design, as all Fujinon zoom lenses (as far as I am aware) have an adjustable flange ring, thus this adapter allows for better macro abilities. Simply adjust the ring until you can reach infinity focus perfectly.

I have also included a .step and the FreeCAD project file to allow for easy modifications. If you have any suggestions or would like to remix the design, please feel free (to comment) :)!