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CPC or Nexstar GPS (Carbon Fiber Tube) and Why?

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#1 gaz-in

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Posted 18 December 2012 - 07:35 PM

Hi All,

I was wondering if you had the option to purchase used the equivalent size and condition CPC or Nexstar GPS (the model with the carbon fiber tube the CPC replaced) which would you choose and why? For example would you prefer a cpc 800 of a Nexstar GPS 8?

Thanks

#2 MikeBOKC

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Posted 18 December 2012 - 09:43 PM

The optics are going to be the same. The CPC is a dual fork mount while the Nexstar is a single arm fork, so the CPC will be heavier and less prone to vibration. On the same issues, the CPC tripod is considerably stouter . . . and of course those factors also make the CPC bulkier overall for transport and setup, while the Nexstar is more easily handled for grab and go use. The CPC does have a built in GPS which makes the alignment procedure a bit simpler, although both use the same basic go to system. Overall I would say the CPC is the better choice unless weight and transport are major factors.

#3 gaz-in

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Posted 18 December 2012 - 10:23 PM

Hi Mike,

Thanks lots for taking the time to reply to my post. As I read your reply, I realized I did a poor job of asking the question. I was asking about the the choice between a CPC and the Nexstar GPS (dual forked model the CPC replaced).

I have edited my post to be clearer. Thanks tons for taking the time to reply.

#4 CarolG

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Posted 19 December 2012 - 10:11 AM

I have a Nexstar 11 and bought it new about 7 years ago. It has performed flawlessly in all that time. I've never viewed through a CPC, but it is my understanding that the optics of the 2 are the same. The big differences (besides the CF tube, which is more expensive than the aluminum tube and will not scratch like aluminum)are the bronze (I think they're bronze) gears in the Nexstar and the slip ring in the NS series. The slip ring is another feature which is more expensive and is very helpful in reducing cord wrap. My NS11 has GPS which works well, but if you know your coordinates, it really isn't a necessary feature. The CPC does have a beefier tripod, but for me, that is not an issue, since I have my NS11 mounted on a wedge on a permanent pier. When I did use my NS11 on the tripod, the stock tripod was more than adequate. The bottom line, though, is, in my opinion, you can't go wrong with either a CPC or Nexstar. If I were to ever replace my Nexstar 11 (which is very unlikely), it would be with a Celestron 14". It has to do with that pesky "aperture fever"!

#5 gaz-in

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Posted 19 December 2012 - 11:40 AM

Thanks Carol,

Thanks for the good inputs. The one tha struck me is the slip ring. I really dislike fooling with the cordwrap issue. I am really partial to the look of the NS vice the CPC. Kinda like the look of the Carbon Fiber Tube.

I wonder is the NS heavier than a comparable cpc? I should be bale to find the weights with "google"

Thanks again
Dan

#6 Bob Griffiths  Happy Birthday!

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Posted 19 December 2012 - 11:55 AM

I looked and looked for a used NS11GPS before I just gave up after a few months and purchased a CPC1100 about 5-6 years ago...

WHY ? well because of the non rotating mount that was used on the older models and the better (Stronger ?) gears and bearings that were used in the older models ...

I did spend about 6 or so bucks and replaced the nylon ball bearings in the base of my CPC with steel ones... ONLY because it was a cheap quick and easy to do procedure that I felt was worth 6 bucks and a little time on a rainy day.....

Personally I'm quite happy with my CPC BUT I still think the NSGPS11 was a better overall scope..

Bob G.

#7 CarolG

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Posted 19 December 2012 - 12:48 PM

Dan,
According to my NS11 manual, the NS8 GPS weighs 42 pounds, the NS9.25 GPS weighs 58 pounds, and the NS11 GPS weighs 65 pounds. The CPC8 is 42 pounds, the CPC 9.25 is 58 pounds, and the CPC11 is 65 pounds. These weights do not include the tripod weights. So, there is no difference in weights.






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