Thierry_Beauvilain

Hello, I got some strange circled patterns on preprocessed pictures (with Siril 1.0.6). When inspecting my flats I saw some vignetting and concentric circles and other strange things. My setup is: - Refractor APM LZOS 130 F6, - APM Riccardi M82 Flattener (52 mm image circle) with M82 to M68 adaptor ring, - M68 Zeiss rapid ring, - M68 Baader tilt ring, - QHY M OAG in M54, - QHY CFW 3L 7 2'' filters with full set of Antlia Pro 2'' mounted with M48 threads LRGB + Ha OIII SII pro 3 nm - QHY 600 M PH - Home made flat box with ceiling light box with 224 led with white translucent polycarbonate + transluscent paper and white diffusing polycarbonate: much larger than the APM 130 aperture, On luminance nothing appears and on others lots of things see attached pictures. I compared with an Astronomik 2'' mounted filter in an Altair filetr box but with my previous camera a Canon EOS 6D MkII moded with astrodon filter and no rings on flats the sole vignetting is due to camera body. Has anyone already got this with ANtlia filters ? What are your thoughts about that ? Thanks a lot for your replies. Clear Skies ! Thierry