Hi Dan,
No, this time I sacrificed the sharpness of stars for better detail in the comet.
The shot at f4 was just a bit too dark and as I was guiding on an EQ mount and had foreground detail I didn't want to blur that too much.
As for focus, this morning I was lucky to have a bright light in the distance which I spot-autofocused on before switching off the AF.
Cheers
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