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Old 07-01-2009, 01:02 AM
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Gama
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Join Date: Dec 2005
Location: Melbourne
Posts: 1,121
how are you guiding ?.

Field rotation is easily recognised by the fact the guide star is a nice point, but as you move away from the guide star, the stars begin to show larger and larger arcs (centred around the guide star).
If the trails are straight, then it may be many things, like DEC error, flexing etc.

Theo
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