Quote:
Originally Posted by Rez
I'd probably lean toward an OAG, the community seems quite divided on them. Personally I think it makes sense, but it concerns me I've read others rubbish the idea.
I'll mostly want to be imaging galaxies and nebulae.
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A good OAG beats a guidescope, always, a poor OAG will cause headaches.
Imaging galaxies requires long FL in the southern hemisphere. More importantly it require very dark skies. Nebulae are best imaged at short FL, so you are stuck in-between, better to have two OTAs for these two different requirements.
I am considering the 16" GSO RC for galaxies, the ASA does a beautiful job on nebulae, but I'll require longer FL for galaxies.
Quote:
Originally Posted by alistairsam
also account for a filter draw or wheel if you'll be using filters. they'd need to be in front of the OAG.
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Or not, my OAG (the internal guide chip in the CFW for STT) is in front of the filters, as can the MOAG setup, it is so much better.
Cheers
Stuart