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Originally Posted by codemonkey
Interesting... I did upgrade SGP recently, but I can't remember if I had the newer AF stuff prior to that upgrade. I think I did... I know I had issues with NGC 2070 recently with SGP detecting nebulae as stars. Could be user error too!
Colin I think they recommend going out to about 3-4x the best HFR when doing AF. i.e. if you find the best focus you can achieve reports a HFR of 1, then you want to make it so that the top of the v-curve is between 3 and 4. Step size of 100 is probably a reasonable starting point, just play with it until you get a ax HFR within that 3-4x range.
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So it is
Not just me! SGP stubbornly refuses to do AF on NGC2070. I ended up slowing away to run focus on each filter change then getting it to slew back each time. Tonight I am doing the crook and AF is just purring. To be honest I probably don't need to focus each filter change, just do it to make sure it is always as good as it can be. Must look into working out the offsets though!