Quote:
Originally Posted by ejcruz
Yes it's a QHY5 guide camera, thank you for the advise however, how do I improve my OSC.
Cheers
Eddie
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Everytime I got a low (<0.2) or high (>0.5) OSC I was guiding close to the celestial equator. 90% of the time it was a balance issue (west too heavy or too well balanced with high backlash in RA) or poor polar alignment. The rest 10% was the agressiveness in PHD. Lowering it to 60% smoothed things up. Seeing can make your guiding turn to .... real quick too, so something to consider. Bad seeing, longer guider exp. (2-3s). Normally 1s works nicely for me in good seeing. Your RMS is very good though. I typically get 0.3-0.4. May be because I dither and bump the mount all the time though.
To improve your OSC. Be east heavy all the time, get your polar alignment spot-on so you hardly correct in DEC, guide every 1-2s minimum. Pick a bright enough guide star. I found picking the right star makes a hell of a difference. Not too bright but not to dim either. Problem is that PHD will guide on really faint stars too, but the guiding IMO is not as good?