Quote:
Originally Posted by Tandum
This Guy found poor support of his imaging mirror was causing his flexture problems.
Exactly how does it appear in an image? eggy stars?
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Good link, and mirror flop/flexure is outside the guide loop too.
Yes, usually the RA direction shifts the most, so along with PE, you get eggy stars. If DEC also flexes, then you get fat eggy stars.
This is all mainly shows at or over 2.5 m FL and say 5 or 10 min exposures and longer (thats when you use internal guide/OAGers etc, so the imaging train is in the control loop, all flexure is compensated for).
Shorter FLs (wide field) and/or shorter exposures are proportionally less critical.