That "tilt" command is fantastic. I've never bothered installing/learning CCD Inspector or ASTAP for their tilt analysis. I've always just used PI's FWHMEccentricity script with support. I've always suspected a bit of tilt in my images. Well... I have SiriL, so I opened up a sub and ran the tilt command. Yup... there's some tilt there. Couldn't be easier... just type "tilt" and it gives you a nice graphical representation of the tilt.
SiriL is really a great tool that has had a lot of hard work put into it.
Edit to add some visuals
First, is the result of the tilt command for a sub taken with my GT81 and 6AIII:
Next is the result of tilt for a sub taken with my GT81 and the Hotech 2" flattener I just got:
Edited by jonnybravo0311, 29 November 2021 - 01:27 PM.