Photography adapter for enlarger lens (L39 to NIKON-F)

Digital photography has become mainstream, and film cameras have declined. 
As a result, the used market is full of obsolete enlarger lenses.

Enlarger lenses often have good performance.
However, the lens mount for the enlarger is different from that of the camera, 
and there is no focus adjustment mechanism, 
so it cannot be used for photography as it is.

So I made a lens adapter for the enlarger with a 3D printer. 
Adapter connects the L39 mount to the NIKON-F mount. 
A simple focusing mechanism was also incorporated.

Bayonets were individually molded and glued to ensure dimensional accuracy.
Align the hole in the brim with the notch in the bayonet.