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On Tue, Dec 8, 2020 at 09:50 AM, Michael Herman wrote:

Just curious...what are your autoguide exposure times??

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Glad you folks are testing the multistar idea.??

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If your polar alignment is near perfect multistar alignment should work.? If your polar alignment is off, the different guide stars will appear to rotate with respect to each other.? I think then the algorithm must have some smarts to know what to do.? In fact a multistar alignment using multiple stars rotation data should be able to show the mount polar alignment is off.

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The ASI178 is a backside illuminated chip...very sensitive.? I was even able to see M1 in 2 sec guide exposures last night in my 80mm piggyback guide scope (ASI178MM mono version).??

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I also have to use the max size 50 pixel search box...I wish PHD2 would increase that limit!??

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Stay well, and send some pictures home (to us here!)

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I'm using the default 1 second exposure, as a rule. Sometimes I'll change it, but not normally.

I've been using SharpCap to PA. I take it to extremes though, I try to get all zero's. But atmospheric gives me some anomalies.
But over all I think I'm getting the best results ever now.

I'm using a new ZWO ASI 290 MM mini guide camera. My images have gotten smaller background stars with it guiding. I don't know is it is back illuminated.

I do remember it is using 15 stars as it's search region. And it seems to be working for me. What is gained with a wider search area? (I did broaden mine to 30, from 15. FYI)

Pictures? I'll send you off site to save bandwidth here. ;^)? ?and
I had never heard of the latter one. And beginners luck, it came out right side up.

Anyway, just ribbing Brian a bit. When I pick on you, you come to realize you are a good friend.
Sorry to pirate your reply Michale. ;^)
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SonnyE


(I suggest viewed in full screen)