Quote:
Originally Posted by Slawomir
Lee - I had the same occasional issues in the past. The new version of SGP has an improved algorithm for focusing and it works for me every time, and I only shoot nebulae in narrowband :-)
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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.