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I have had an AM3 for exactly two nights as I said on your other thread. Came with the factory certificate saying 18.5 Max and 7.1 arc seconds Min PE.
Autoguided easily RMS a is sub 1 arc sec..people are reporting sub .25 but I haven’t bothered with trying to get it down as low as possible because my image scale is between 1.9 to 3.6 arc sec per pixel depending on which optics camera combo I use.
One thing I found on night one was that usual RA and DEC aggression of 70 and 100 % ( that I used on my EQ6 and EQ5) is waaay too high and ruins guiding. Somewhere much less aggressive-45 % or thereabouts seems to be the sweet spot. Possibly could tweak more but it’s not worth it for me given my camera and optics.
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