Adapter to mount cameras w/ EF-M (EOS M50 in this case) bodies to telescopes that use 1.25" eyepieces for prime focus astrophotography. I'm sure “proper” products exist from telescope suppliers, but what fun would that be.
Supports will be needed. Print in the orientation of the 3mf for best fit to the camera end of the part. Since the contact area on the build plate is rather small you may need a brim.
The barrel was added in CAD after the STL was scaled up to 102%. PPK's (and the others I found elsewhere) was a little too lose on my camera.
The author remixed this model.