Does anyone know the distance between the filters in the newer QHY filter wheels and the camera? For instance, if I had 17mm of backfocus on my camera, how much distance should I expect there to be between my sensor and the filters? Just trying to figure out if I should go for a 31mm or 36mm filter set. I plan to run f6-7 refractors for now, as well as my f/5 8" newt in the future. It seems 31mm would be enough even considering the simple calculation of 17+20 = 37mm distance, but thought I'd ask to be safe. I should add that the sensor is 4/3, and I don't pan on using anything larger than that for awhile.
edit: added "ask"
Edited by xEOIx, 22 October 2020 - 03:14 PM.