I was imaging the Sombrero last night and using auto select guide star in PHD2 had me guiding around 1.50 to 1.70 arc sec error ( SNR was 36)
I then reset PHD2 and manually selected a guide star at around 52 SNR and my guiding improved slightly to around 1.30 to 1.50 arc sec error
In the PHD2 manual it recommends to let PHD2 find a guide star in lieu of manually selecting one but I have found on many occasions manually selecting an unsaturated guide star at between 45 to 60 SNR gives better guiding through the night
Any comments ??
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