M48 x M42 Filter Holder

This is a filter holder similar to this: https://getogma.com/products/APZLLFH2

But female on both sides, so it can be used with a small astro camera such as the 294MC without the 11mm female adapter. The ridges are a pulley for a future development of a motorized rotator+filter holder. Thickness of the complete part is 21mm.

I printed mine with layer height 0.12mm and PC+CF for lower friction between threaded parts.

As of time of writing, this can be used along with these designs on a Rokinon 135mm:
https://www.thingiverse.com/thing:6151763
https://www.thingiverse.com/thing:6470635

And also a M48 rotator: https://agenaastro.com/blue-fireball-360-camera-angle-adjuster-rotator-m48-thread-r-05.html