While reviewing this for the filter initialization problem, I saw this and some discussion leading up to it:
TRAPPIST - last : I noticed acquire star is looking for star sometimes very far (2 deg), then finds a lot of candidate for focus (mag 11-12) about 1000 stars and then it looks to me this is slowing down FocusMax. Is there a way to say to FocusMax to only look to a smaller field ?
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Berg - The next little bit of code establishes the FOV window for selecting a focus star. It's set for 5x5 degrees by having PL.ArcsecPerPixelHoriz = 600 and PL.ArcsecPerPixelVert = 600. If you change 600 in both places to 120, you'd search a 1x1 degree field. If you change 600 to 60 it would search a half-by-half degree field. Set your own threshold.
Just so everyone knows, I ran simulations to determine that 5x5 degrees is what's needed to reliably get a lone/usable mag 6-8 focus star all sky. Mag 11-12 aren't considered for focus stars. I don't know what the 1000 stars would do to noticeably slow the AF process, the PinPoint scan is fast, under a second. Small compared to the AF process itself. Maybe this is AcquireStar? But then IT uses its own selection logic, so that's why I thought it was ACP's selection logic you are talking about. ???