Hi,
I need adapter to connect my Canon RF, TTartisan 500mm f6.3 manual lens with ZWO ASI662MC
I found one adapter but I think is 12.5 mm thick, i think that should be 7.5 mm for total of 20mm flange distance also M42 thread cannot be screw to the end.
Please help where can i find thinner adapter, I am sure that is possible to be made that adapter.
Vladimir