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Old 19-06-2017, 12:30 PM
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Lognic04 (Logan)
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Ideal guiding arcsec/px?

Hi all,
What is an ideal guiding arcsec/px? assuming i cant get seeing better than 1", is there a point having better guiding than that?
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Old 19-06-2017, 12:56 PM
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RickS (Rick)
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Guide software can calculate the centroid of the guide star with sub pixel accuracy so you don't need really small image scale. I assume you're talking about a guide scope and not OAG? You'll probably get a variety of opinions but, assuming an imaging scope that has a FL that's not long enough to justify an OAG, I reckon you are better off with a small, light-weight, short FL guide scope that's less likely to cause flexure - even if the image scale is large compared to the imaging scope.

Here are some thoughts on the topic: http://www.wilmslowastro.com/tips/autoguiding.htm

Cheers,
Rick.
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