"Don't sweat the petty things and don't pet the sweaty things" - George Carlin deanrowe.net/astro Whats with that avatar?
Quote:New:$5k EM200$3K G-11/CGE
LX850 blog: www.LX-850.com
personal website: www.wadsworthobservatory.com
None of my kit is part of a two year pay to be part of beta test, that still isn't close to ending.
Quote:I also note that the $2K (new) price range has not yet been addressed. Is that because mounts like the Atlas, CGEM, etc. are indeed significantly worse for AP than what you can get by spending another $1-1.5K?
Quote:I have the CGE Pro and I'm very happy with it. Have a couple Apo's on it at the moment but it's flexable enough to mount a 16" RC on (plan for later this year). The G-11 is in a much lower weight class than the CGE Pro (60# Vs 90#), if you want to compare the equivalent Losmandy to the CGE Pro you'd need to look at the Titan.Phil
Quote:I'd wait a few extra months and save another $1.5K - then buy a Mach1....
Quote:Perhaps what you're missing is that most mounts nowadays are good enough out of the box to perform well with autoguiding. As long as the drives are reasonably smooth, autoguiding eliminates the need for accuracy. Many have done excellent AP with a 20lb load on an off-the-shelf CG5ASGT, and it doesn't have PEC. The Atlas is a real workhorse and it seems most agree that it's fine with autoguiding without any upgrades. Of course there are more expensive mounts, but will it show in your photos?
Quote: No one has yet mentioned a Vixen Sphinx SXD. Is that because typical samples tend to be inferior in guided performance to the G11 and CGE in that same price range?
Quote: If you were looking for a mount that could carry at least a 20-lb. AP load and had the best PE behavior out-of-the-box
SCOPES: CPC1100; AT66ED; EdgeHD 8";SVR90T RAPTORMOUNTS: CGEM; Vixen GP2; iOptron Sky Tracker; Celestron AVXCAMERAS: Canon 60D;LodestarEYEPIECES:TV N31T5;Delos14;Delos8;Pan27; PL20;PL25;PL32;TMB9The Lord sits enthroned above the circle of the earth...He stretched out the heavens like a canopy.
"The White Zone is for loading or unloading of passengers only. No Astrophotography." Cosmic Acres! Greatest restoration challenge: Tulley and Sons 3" achromat on Altazimuth mount, circa ~late 1820s
Quote:Have you tried your CPC on a wedge? From what I'm reading about the lower-end GEM's I'm wondering if they'd really offer that much better tracking than your existing fork mount.
Quote:Vixen is well known to have very good tracking performance. I suspect it has more to do with load capacity versus cost, plus difference in the hand controllers...Starbook versus Gemini versus NexStar.Vixen Sphinx SXD weight capacity 50 lbs.
Quote:I wanted to respond to this because I noticed that you have the C9.25. If this is the scope that you're planning on using, I think once you get it fully loaded with AP gear you will find yourself more in the 35 - 40 lb range. I have a C6 SCT and AT66ED refractor and my gear weights 24 lbs with all total. You will probably want a CGE class mount or perhaps a CGEM class mount at the very least. Regardless of the mount, you should plan on autoguiding if you're going deep at the focal length your scope operates at. I think that's going to be true no matter which mount you use.Patrick
Quote:I had seen several old threads on CN and Yahoo that seemed to conclude that the "SXD 50 lbs." included counterweights -- so I was thinking maybe about 20 lbs. for "not pushing it" AP gear.
Quote:The confusion you mention is unfortunate. The "not pushing it" load for the SXD must be greater than 20 pounds, though. The straight SXW is conservatively rated at 22 pounds for imaging (no derating required). The SXD is probably good for 30 pounds (which would make sense, as the usual rule of thumb calls for counterweights about 2/3 the actual load - that would put it at 30 pounds load and 20 pounds CW).
Quote:but I couldn't help but think that the Vixen QC might not be any better than the Synta.