Interesting Jase. I have been using a few softwares recently. Sky X autoguider shows the HFD of the guide star every time it downloads. It can vary quite a bit. Also the shape of the star can vary a little bit.
Makes me wonder if better rez gets a better calculation. Anecdotally I noticed better guiding in the past using 1x1 at times. Hence the topic.
I think I will check this out a bit more and post my results. Perhaps you are right.
Does Maxim multi star guiding work yet? Or are you referring to some other plug in?
Greg.
Quote:
Originally Posted by jase
From tests I conducted a couple of years ago there was no difference when guiding 1x1 versus 2x2 in terms of accuracy providing SNR was ample. I wish I had kept the results but in summary how efficiently the software could calculate the star centroid was based on the SNR. 2x2 will often get you a good SNR using short exposures.
The calculation of multiple star centroids on a guide chip (multi-star guiding) will provide even greater guiding accuracy.
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