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Equipment Discussions >> Mounts

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midnite4blues
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Reged: 11/21/05

Loc: Denville, NJ
C6R + Unistar Deluxe – questions about this combo new
      #4288484 - 01/03/11 09:50 AM

I really enjoy using my C6R in an alt-az configuration, but my current mount (DSV-1) can only be used at very low powers, about 60x max. The GEM that I also use this scope on is an Orion Sirius, but there are many nights where I don’t want to set up the GEM, so I am thinking of upgrading my alt-az to the Unistar Deluxe. Ideally, I would like to use the scope at up to 180x with some acceptable vibration (comparable to the Sirius). Now I am trying to figure out the best set up for this goal.

First, the tripod… I am currently using a CG-5 tripod with 2” SS legs and the SVP extension column. I could get an adapter to mount the Unistar on top of this or I could get the UA heavy duty surveyor tripod. The CG-5 + extension would win for max height, but I’m not sure which set up would be more stable. Any opinions?

Second, the saddle/jaw… UA offers a few configurations, 3”, 7” or 12” saddle? 2” vs 3” jaw? All of my other scopes and mounts use vixen dovetails/saddles, so the 2” jaw is a no-brainer. I guess the real option to consider is the saddle. Does the 12” saddle provide that much more stability than the 7”? I plan to speak with Larry about the options, but I’d like to get some opinions first from the CN crowd.

Thanks in advance for any feedback!


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Jim7728
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Re: C6R + Unistar Deluxe – questions about this combo new [Re: midnite4blues]
      #4289396 - 01/03/11 04:11 PM

Hmmm...180x may be a bit much even for the Unistar Deluxe. I have the model with the old style knobs on a Oberwerk wooden tripod and thought it was okay with the NP-127 ota, but don't think would go anywhere near 180x, mind you the Oberwerk wooden tripod is a medium duty setup, imo. I actually use that setup with a TV-85 and Lunt -60 telescopes.

When I had a CR-150(aka early C-6R), it was on a CG-5AS tripod with SVP-extension and GIRO III head with counterweight. I recall going comfortably up to 136X with a 8.8mm eyepiece and maybe with a dual-speed or electronic focuser I could have approached 180x as focus shakes were the limiting factor.

Anyway, give Larry a call and I'm sure he'll come up with a proper setup... maybe the Super 8 Deluxe.


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midnite4blues
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Reged: 11/21/05

Loc: Denville, NJ
Re: C6R + Unistar Deluxe – questions about this combo new [Re: Jim7728]
      #4289492 - 01/03/11 05:00 PM

Jim, good points. I wouldn't expect focusing at 180x to be easy, but it would be nice if it was possible. Thats about how I would sum it up on the Sirius mount with same tripod and extension - difficult, but possible.

As for the different variations to the Unistar mount, the UA website is very confusing and I know I need to speak with Larry about the options. Just looking for feedback from users at this point.


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dwmedic
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Re: C6R + Unistar Deluxe – questions about this combo new [Re: midnite4blues]
      #4290338 - 01/03/11 11:28 PM

I would call Larry, I too found the website alittle confusing. He was very helpful, got me just what I needed. I used mine with a meade field tripod and it handled my meade 10in sct and my ES AR152 refractor very well. Don't have it anymore but if I can remember correctly dampening time was not to bad with the sct under high mag. never really timed it. Like you I used it when I didn't want to take time to set up my atlas. Derek

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dwmedic
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Re: C6R + Unistar Deluxe – questions about this combo new [Re: dwmedic]
      #4290351 - 01/03/11 11:34 PM

Forgot to mention. Mine had the 7in saddle with the 3in jaw and double clamps. I also switched over to a losmandy universal dovetail more stable than the vixen. Derek

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midnite4blues
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Reged: 11/21/05

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Re: C6R + Unistar Deluxe – questions about this combo new [Re: dwmedic]
      #4293823 - 01/05/11 02:07 PM

Quote:

Forgot to mention. Mine had the 7in saddle with the 3in jaw and double clamps. I also switched over to a losmandy universal dovetail more stable than the vixen. Derek




Well, after a long conversation with Larry, I orders a Unistar with the 7" saddle and 3" jaw along with a 12" losmandy style dovetail bar. This seems to be the way to go for heavy and long scopes like the C6R. At some point I will post a review of the performance of this combo.


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jason_milani
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Re: C6R + Unistar Deluxe – questions about this combo new [Re: midnite4blues]
      #4294169 - 01/05/11 04:19 PM

I had this combo. I had the Unistar Deluxe with a 7" saddle (Losmandy type), my skywatcher 150mm achro (same as the CR6) but tried it out on a wooden Surveyors type tripod. The tripod was definitely the weak link. You need a substantial tripod to get the full use out of that mount.
IMO it's the best alt-az for the money.


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midnite4blues
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Reged: 11/21/05

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Re: C6R + Unistar Deluxe – questions about this combo new [Re: jason_milani]
      #4294273 - 01/05/11 04:57 PM

Jason, after discussing the tripod options with Larry, I decided to start out by using what I've got. I have a few different tripods ranging from 1.5" to 2" SS legs. If none of them give me the combination of steadiness and height, I will look for some other options. It was nice to talk to someone about a potential purchase and not be pressured with an upsell. He could have pushed the heavy-duty tripod he sells, but he thought it was a good idea to try what I have already. Sincerely a nice guy!

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coopman
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Re: C6R + Unistar Deluxe – questions about this combo new [Re: midnite4blues]
      #4306093 - 01/10/11 10:57 PM

I use my 120ED with a Unistar Deluxe and the heavy duty surveyor's tripod that Larry sells. It's a good combination that I am enjoying. It works best if you use lightweight eyepieces. Heavyweight eyepieces will throw it out of balance and then you have adjust the tube in the rings to get it rebalanced.

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midnite4blues
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Re: C6R + Unistar Deluxe – questions about this combo [Re: coopman]
      #4362424 - 02/04/11 08:49 AM

I got my Unistar last week and had it out for the first time last night. Top to bottom, the set up was:

C6R
3"x12" dovetail plate
Unistar Deluxe
SVP extension column
CG5 tripod (set at shortest height)
Anti-vibration pads

All I can say is, this mount is amazing. It held my C6R steadier than my Sirius EQ mount. I pushed the magnification up to 180x and I was able to focus easily (I also upgraded the focuser to a JMI EV2). The interesting thing about this mount is that balance doesn't seem to be as critical as other alt-az mounts I've used. I started with my heaviest 2" eyepiece, a 40mm SWA, and balanced the scope a little heavy on the eyepiece side. I do this with other mounts as well since the 40 is mainly my finder ep and I usually change to something lighter for real observing anyway. But on other mounts, the starting "off-balance" set up is a little unsteady and then the mount steadies when I change to something lighter. On the Unistar, the slightly off-balance set up was not bad at all. Then when I switched to my 18 UWA, the mount was completely transparent. The view of M42 was increadible. Then I moved up to a 6.7 UWA and thats when I realized I made the right choice with this mount. I've never been able to focus easily with this scope/ep combo until now. I was able to easily get a sharp enough focus to resolve a fifth star in the trap. I think I also saw the sixth star, but I can't say for sure.

Overall, a great mount that I would highly recommend to someone with a large refractor.


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