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RoundStars
super member
Reged: 07/09/08
Posts: 188
Loc: Ware, MA
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Re: Image drift?
10/12/09 07:37 PM
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I'm guiding in both RA and Dec. I'm sure that polar alignment is off at least a little, but the mount is responding to commands and keeping the guide scope right on the guide star, without a great deal of movement on corrections. The pier is level, and the scopes are balanced. Camera cables are looped loosely to the pier so that their weight doesn't interfere with equipment movement. I usually make 5-second guide camera exposures. Stars are almost always egg-shaped, in the same direction that the image drifts across the FOV.
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