Vland

I didn't read anything about that in the manual, maybe it's just not documented? Anyway before that I will check other mechanical issues... it also could be focuser related. the wheel + camera is quite an heavy setup and the extension of the focustube required to reach focus doesn't help.

Thank you. your post makes perfect sense It's difficult already dealing with all the spacers, adapters, software etc etc without having to deal with a tilted sensor on a brand new camera. I'll try to understand if this can be fixed and how...

Hi all, I tried my takahashi reducer 0.73x (CR version) for the first time with my FSQ85. I can see a distortion problem but I'm struggling to understand the reasons. you can see it happens before the meridian flip and also after, in the exact same ccd area (QHY268M APS-C sensor). I'm pretty sure the reducer 0.73 should be able to cover an APS-C sensor without issues. The right part of the image looks like my sensor is too close to the reducer, with stars pointing towards the centre. but why the problem isn't mirrored on the left part? single exposure 60s, some zoom-in.... (full pictures attached) upper right corner lower right corner upper left lower left thanks for any input!