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Hmmm
OAG = Off axis guider
CCD= Charged coupled device
C925 = Celestron 9.25" Schmidt Cassegrainian Reflector...
x0.63 means a standard Celestron/ Meade lens system which is marked "x0.63" and reduces the effective focal length of the system by this amount when positioned at 110mm from the CCD chip.
Anything I've forgotten.
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