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When is autoguiding overkill ?
Autoguiding is definitely beneficial for prime focus long exposures , and for probably for most long exposures with telephotos longer than 150mm if you plan on blowing up the images significantly.
Just wondering what others think EFFECTIVE region for autoguiding is in the fov vs t(Exposure) plane. Assuming you have good polar alignment , accurate tracking perhaps including PEC.
Anyone have thoughts on this (based on experience in their digital astrophotography) ?
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