I have many years dreamed about a medium format system for the telescope. Some cameras like the Fujifilm GFX 50 R are cheap as used. But there are some problem with them so I haven't invested in a MF camera yet.
Until better cameras has arrived I play around in the CAD program to design an off-axis guider that can be used with medium format cameras or a full frame mirrorless camera.
Here is my CAD drawing ideas:
http://www.astrofriend.eu/astronomy/...t-offaxis.html
The working space between the flange of the lens, Pentax 645, and the mirrorless MF camera is 44.17 mm or even more with a full frame mirrorless camera. I have also implemented two filter draw boxes.
This is more because it's fun to test ideas, maybe there will never be a MF camera. But a full frame mirrorless I can buy today if I want.
/Lars
