I am using a Pegasus Astro Focus Cube V2 on a Celestron Edge HD C9.25 and the SGP autofocus routine.
I had to increase the focus step size to 500 in order to get any kind of "U" or "V" shaped curve for 9 data points.
I have manually focussed the telescope so it is close to focus and disabled smart focus for the EDGE.
The other major options are in the attached screen shot.
With this large step size I get a "U" shaped cuver but the quality is rarely over 80% for the full 9 points and the auto-focus fails after 3 attempts.
I have attached and SGP log file too if that helps.
Is my binning at 2x2 still too low? I noticed some comments in the log fiile "AF frame was too large... downsample = 0.75...".
Can I turn down the "quality" needed for an autofocus position? A curve with 70% quality looks OK to me but the autofocus routine apparently wants > 90%????
I have tried various numbers of data points, step size, min star diameter,... but nothing gives me reliable autofocus so I am imaging with autofocus turned off.
Thanks for any suggestions.