Celestron CG5 is on sale?
Posted 13 March 2013 - 03:20 PM
I just see that celestron CG5 is on sale for $549 at OPT and hight point scientific, is this a good deal?
I was looking for one of these for imaging these days, and I happen to have some discount code from high point, so I put my order.
how good is the tracking of this mount without guiding? with my old alt-az GOTO mount, the best I can do is 3s, I have to take a lot of shots on one object, 500 normally, kinda worry about the shutter on my new camera.
if I can do a better job on polar alignment, say by drifting polar align, will I be able to get 60s unguided?
Posted 13 March 2013 - 04:10 PM
Posted 13 March 2013 - 05:13 PM
Short focal length setups (smaller refractors, or larger scopes with focal reducers) are much easier on the mount. Your not going to be happy trying 2-3 minute subs with something like a C8 at it's native focal length (over 2000mm).
Used under the right conditions (with an appropriate scope/camera) and with realistic expectations the CG-5 is a great deal on sale right now.
Posted 13 March 2013 - 07:19 PM
I do imaging with a 80EDF with 500mm FL, not a long FL I guess.
Posted 14 March 2013 - 03:07 PM
Your 500mm focal length will yield acceptable tracking for AP for at least a couple of minutes, provided you spend the time to accurately and critically polar/drift align your equipment. Of course the term "acceptable" is subjective... At this price point there are few other options that are the CG-5's equal.
Posted 14 March 2013 - 10:13 PM
I just got my CG5 today, the tripod is impressive, feels very sturdy, and yet the whole mount is not too heavy. will try it outside when the sky is clear.
but I have a little problem with the counter weight, it's too heavy to balance my little 80EDF, I will need a lighter one, maybe 5lb, any advice?
Posted 15 March 2013 - 07:41 AM
Posted 15 March 2013 - 12:16 PM
The best investment I've made so far in AP has been my guidescope. I picked up an 80mm f/5 refractor with a QHY5 camera for $300. That instantly let me go from 2 minute subs to 15 minute subs. The only other cost for me was the rings to mount the scope (I think I got those for around $40).
Guiding can also eliminate the problem of periodic error as long as the errors are not extreme. I think that getting a guidescope will *greatly* enhance anyone's enjoyment of the hobby as it lets you reach deeper and fainter targets. So, once your wallet recovers from buying the new mount, I'd say watch the classified ads on here for a guider =)
Posted 15 March 2013 - 04:12 PM
Posted 15 March 2013 - 07:31 PM
and Tim, good idea on using weight lifting sets, really worth trying, i can make of the these myself.