Celestron Nexstar 8i


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Subject: Re: vote by RobertFos
By: Anonymous (xxx.xxx.0.245)
Date: 01/29/2003 10:03:05 pm PDT
>I decided for this new icomp model because of some comments I read about its better tracking/backlash in comparison with the old Nexstar 8.
>What a deception !
>The backlash of this telescope is a real nightmare, I noticed severe "jumps" in altitude movements , it is even more jerky than the Nexstar 8.
>The tracking is still terrible, you can't track an object in the FOV with the standard 25mm eyepiece for more than 5 minutes.
>Even with the new autoguided port I have serious doubts about imaging with this kind of telescope.
>Also the price is not that good because I had to spend more U$ 149,00 for the upgraded HC and U$ 169,00 for the tripod.
>I'm very disapointed with this "new" model from Celestron and I will try to replace it for an LX90 with my dealer.

Reply: Spend more time with the set up (i.e. leveling, proper time and insuring that the 2 guide stars don't drift and you may see a difference. My 8i is great. I upgraded to the heavy duty mount. Don't be too hasty switching to Meade. Mine ties a CG11 I once looked through as the best optics in a SCT that I've ever seen. Meade can't match it optically.


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Subject: Nexstar 8i
By: Anonymous (xxx.xxx.224.7)
Date: 05/08/2003 05:13:54 am PDT
I guess it all becomes a subjective thing, I love my 8i! I am 54 with a herniated disc and need a lightweight and modular 8"SC. The optics are superb!
I use a 30mm Widescan Kohki and have ordered the 20 and 13mm from Astrosystems. Also use a 10mm Speers waler and celestron binoviewers with 2 Apogee Zooms. I am very please with the GOTO accuracy. The backlash CAN be worked with by adjusting the settings. I feel the scope is a real winner...
Mike Anderer St. Charles, Ill 630-377-6141


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Subject: NexStar 8i
By: Anonymous (xxx.xxx.225.8)
Date: 09/07/2003 09:49:46 am PDT
My 8i has been returned to Clestron for repairs as the hand controlls
would not communicate with the the scope, and I`ve only had it for about
6 months, plus I could not use it that much do to weather conditions.
The altitude backlash can be very bad at times.
The optics are very good, and it is portable.
As for price, shop around, as you you can find them cheaper than $1199.00 Clestron price.

.


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Subject: Re: vote by RobertFos
By: Anonymous (xxx.xxx.133.139)
In Reply to: Anonymous (xxx.xxx.0.245) (Original Message)
Date: 09/16/2003 09:25:25 pm PDT
You need to adjust your backlash settings. If you do this, you'll notice a big difference. I have found the best settings for my 8i. There is no backlash detected. The 8i is a great scope.


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Subject: Re: vote by JKZimm
By: Anonymous (xxx.xxx.11.177)
Date: 08/01/2005 02:45:23 am PDT
Do you know the primary difference between the Nexstar 8 and the Nextar 8i?
Thanks.
>I bought the 8i to have an instrument of reasonable aperature in a portable package (I had previously owned a Nexstar 8, sold it, and later regretted doing so). At 35 lbs setup, this is about 10 lbs lighter than any other 8". I am impressed with the improvements Celestron has made to the original NexStar 8.
>
>First, the tripod is very solid, and combined with vibration suppression pads, provides a damping time of about 1 second at 200x.
>
>Optically, it is excellent - Celestron appears to take great care to produce high quality optics. If anything, the optics appear to be better than my previous NexStar 8.
>
>The computer hand controller has the upgraded database, and is very easy to use. It does not have all of the whistles and bells the Meade Autostar has, but in the field, I believe it is actually easier to use.
>
>The 8i's GOTO capability is superb, and this may be the single greatest improvement Celestron has made to this instrument. Alignment is easy, GOTO's very accurate (it will put objects near the center of the FOV at 117x), and tracking very good for this type of setup. The tracking motors are quieter than in the Nexstar 8. In comparison to a Meade'd Autostar on an LXD55 mount, the 8i acquires an object much faster.
>
>Other nice features include a buttery smooth focuser that shows no evidence of mirror shift, and a very high overall quality of construction throughout.
>
>The only negatives I find are the manner in which the hand controller is stored (it looks nice but is difficult to access) and the lack of some features in the hand controller computer (inability to download upgrades and observation lists, inability to adjust brightness of display, etc.).
>
>Overall, this is an excellent telescope for the money, and I have to give it a 10 in recognition of the trmendous value it represents.
>
>(For comparison, I also own a Meade AR-6 6" refractior and a Meade ETX90 RA. These instruments form the basis of some of opinions abou the 8i).


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