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The graduated scale on my Vixen GPDX is probably reasonably accurate, but the resolution of the 1 deg markings is not really accurate enough for astrophotography, unless you are using a 'scope or camera lens of less than 500mm focal length and limit your exposures to less than 2 or 3 minutes (tracking but unguided). For visual observing, it is fine.
However, I use the latitude scale to put me in the right region of the SCP, and then use the very nice Vixen Polar Alignment Scope (PAS), which is a 6x21 'scope built into the RA axis. The PAS has an illuminated reticule with a pattern of stars that include Sigma Octans so that I can get a very good polar alignment.
Does the CG-5 have a PAS?
Cheers
Dennis
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