Canon EOS RF to Robot M26 Adapter

A simple adapter from Canon EOS RF (EOS RP in my case) to a Schneider Robot Xenon 40mm f/1.9

The v2 fixes a lot of these issues:

• no sanding needed, it's now the proper focal distance
• added a mark for the dot and a twist lock, the body is wider too

The older version had some issues that I fixed "in post" as I didn't had the patience to fix them back then:

• It's too tall - I had to shave 1-1.5mm from the top for it to focus to infinity.
• It misses a mark for the red dot (the position to insert it before rotating) easy fix with a marker
• It misses a notch for the locking pin because I'm a noob, it's my first model and had no idea how to calculate it's possition :) I made it with a rotary tool. Also it's too narrow - if you want the pin in a hole, not a notch you need to enlarge the base "skirt"
• The lens screwed in very hard the first few times. Don't force. I screwed half turn, got back and like this a few times turning more and more each time. It's still hard to turn, but I don't mind I only have one lens, I don't plan to remove it now that it's sanded to the proper size.

Based on work of  https://www.thingiverse.com/thing:4621075 and https://www.thingiverse.com/thing:4230210.

If you have the patience I think printing at 0.1mm will give you better threads.