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In SGP and now Voyager I normally focused at 1X1 as I was using an OSC camera. It was a little slower in SGP due to the process to detect stars and it using the whole frame but I use the "robostar" focus routine in Voyager which centers the scope on a selected star then uses a small subframe.
The main advantage to binning during focus as far as I understood it was download speed, but the Voyager method using a small subframe largely negates that. The download is very fast as I think it is only downloading something like a 64 X 64 pixel subframe.
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