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Originally Posted by g__day
I'm curious - what is the purpose of the sync function, what does it do?
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Short for synchronise function. Its important if your goto's are a little off and you want to be more accurate, then you goto a known object in the handsets database or a planetarium program - use the directional keys on the handset to bring it into the centre of the eyepiece and then sync on the object by (in this case) pressing the escape key for 2 secs. This alters the pointing model of the scope to take in any inaccuracies and in the case of SynScan ver 3 can be done for 85 objects across the sky. Therfore getting better pointing accuracy particularly in the area of your sync onject. Makes it easier to place a faint object on the chip of a CCD.