Hi, was one of the early adopters of the ASI6200MM from 2000. For the past 4+ years I've been using the Antlia Pro NB 3nm filters and most prominently with the Oiii (but although it does happen to the other NB filters too) that I get a flats overcorrection and have never been able too solve. this issue.
It happens on my Mewlon 250CRS, 125SDP, FSQ85ED - the imaging train is the same - ASI6200MM - EFW - OAG. Things that I've tried and has not worked :-
- 3D printed "shields" in case of any light leaks
- confirmed matching same sensor temp, same gain, same offset
- sky flats, proper astro LED flat panels, std tracing panels
- different scopes (mentioned earlier)
- lent my Antlia Oiii to my friend (who has the QHY600) - no problems with his setup on my filter
- different ADU settings (20%, 30%, 50%, even higher) on NINA
- Also tried flat darks vs Bias
Could there be something wrong with my ASI6200MM being an early adopter? Would ZWO take in for overhaul checkup? (I understand it's out of warranty).
