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Hello Jen,
The remote box you mention isn't necessary if you have a laptop and are OK with using it. The Gstar can use a RS232 (serial) cable instead of the remote box - costs AUD65 instead of AUD100.
As far as tracking, well I went to a lecture by Brother Mike Salway last week at the Sydney City Skywatchers, and he did some amazing pix with a 10" dob (i.e. no tracking at all). Just a Philips 840 TouCam equivalent.
So I think for planetary at least, you will do very well with the 6" Newt and the Gstar. Your big hassle will be finding faint DSOs, this can be overcome to some extent if you have the laptop and Stellarium, you can use Stell to locate the approx position of the DSO of interest with respect to nearby stars, then scan around with the Gstar at high gains and you will see DSOs better than through the eyepiece.
Regards,
Tony Barry
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