Mount Musings: Celestron VX and Atlas Pro AZ/EQ
Posted 07 February 2013 - 10:53 AM
First, the VX. Is the VX's base compatible with the CG-5's and Sirius'/HEQ-5's bases? The latter three mounts share a common base (along with the Orion SVP) allowing them to share accessories such as Antares piers and the Orion SVP 18" extension. It would be nice if the new mount had the same interface as these older mounts for backward compatibility.
For the Atlas Pro AZ/EQ, one thing that troubles me is its use of belts. Automobiles, too, use belts and these are a routine service item that have to be replaced periodically. I realize that the belts in a vehicle have a much harder job (high heat, high RPMs, etc.), but does anyone anticipate that the belts in the Atlas Pro may become a wear/service item down the road? In other words, will the belt drive wear more quickly than a metal-to-metal geared system?
Posted 07 February 2013 - 11:01 AM
Posted 07 February 2013 - 02:25 PM
No, the base is different to the CG5.
Yes, the N peg can be moved - at least there's a suitable threaded hole.
As far as the timing belt goes, if it's got the same lifetime as a car timing belt it should last for several thousand years.
Posted 07 February 2013 - 02:30 PM
Posted 07 February 2013 - 03:51 PM
Posted 07 February 2013 - 03:52 PM
Posted 07 February 2013 - 04:12 PM
Now that I said that it will break tomorrow.
Posted 07 February 2013 - 04:57 PM
I was actually thinking of serpentine belts for the power steering and the like which typically are replaced multiple times during the life of the vehicle.
Same deal...think of the stress and the environmental conditions they are subjected to compared to telescope mount parts.
Posted 07 February 2013 - 05:26 PM
Oh, one more question: Can the "N" azimuth pin on the tripod for both mounts be re-positioned from being between two legs to being aligned with a single leg (i.e., so the CW shaft hangs directly over a "N" leg)?
Yes. That is the first thing I did to my Skywatcher AZ/EQ6 when I got it. Otherwise it is difficult to access the polar scope. I am not sure why they deliver it on the other side unless it allows rotating the scope without hitting the legs. I never tried it.
Posted 07 February 2013 - 05:27 PM
Posted 07 February 2013 - 11:12 PM
Posted 13 February 2013 - 08:48 AM
I used my new VX for the first time last night with a Vixen 102EDSS and a pair of BVs operating at 139x. I leveled, rough polar aligned , and used 2 calibration stars in set up. The mount put every object that I tried within a .47 deg fov every time. It held Jupiter steady for the half hour that I observed it. The mount is fast and quiet compared to my CG-5 ASGT. As others have already stated, the Orion extension doesn't fit, and the north peg can easily be moved to sit over a leg. All in all, I'm very happy with this mount's initial performance. Time will tell if it is durable.