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Celestron NexStar 8 Special Edition

Two questions  - 
I have not run my telescope in a long time - but when I through the switch, the hand controller says initializing, then goes blank - nothing happens!!  What could it be?
Second item - how to I attached a 2" orion delectic diaganol to my Special Edition?  I need another part or something???

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Running on internal batterys? They may be depleated. A large diagonal should go into the focuser, if the reducer/adapter is removed.

Posted on Jul 07, 2008


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Celestron 8se slews uncontrollably. Also gives a no response 16 on the hand control.

This is a well documented problem with that scope

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RESET the hand controller-- then turn it off-- wait 15 seconds and turn it back on. If this does not fix it the firmware will need to be reloaded. You will need a special cable from Celestron to update the firmware.

I would simply return the scope and get another one-- if the scope is new.

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Reset the hand controller and reload the firmware. You will need a special cable available from Celestron to load the firmware. The software is available for free on the Celestron web site.

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Are the batteries fresh? You can also try a new hand controller cable maybe the one you have is broken which is a common problem.

Beyond that you can try to borrow another hand controller and try it. If none of these work, then you have a blown circuit inside the telescope. It will need to be returned to Celestron for repairs.

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Looking for a replacement focuser for a Celestron NexStar 130 SLT.Would like it to be 1.25 with 2in capibilty with fine focus dial

Either contact Celestron directly-- or look here--

Feb 13, 2011 | Celestron NexStar 130 SLT (306 x 130mm)...

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Hi i just bought a acelestron nexstar 4 se telescope and when turning on the hand control it indicates transmit data and is stuck there , i can't set anything .

The hand controller is stuck in DOWNLOAD mode. Usually cycling the power off and then back on fixes this issue. Is the scope new? If it is take it back to the store and get a replacement (at least get a new hand controller).

The batteries are FRESH I would assume?

Here is Celestron's instructions for fixing these type of problems:

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First do a RESET on the hand controller and make sure TIME, DATE, and SITE, are correct.

If this does not work then RE-load the firmware in the hand controller. If that fails contact Celestron customer service.

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Do you have a fresh set of batteries in the scope? Better to use an outside 12 volt power pack with the Celestron 12 volt "cigarette" lighter cable.

This can be three things:

Low power

Bad cable from hand controller to scope.

Or a broken hand controller

Try fresh batteries first.

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You can enter the Latitude and Longitude of your SITE rather than the city. Also check on the web site for updated hand controller firmware which you can download and install. You will need a special cable (which you can buy) that connects the computer to the bottom of the hand controller.

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Send it back along with the hand controller describing the problem. Could be several things including a bad hand controller. If there is a local astronomy shop nearby take the scope there and ask to try one of the hand controllers in the shop and test it. If it now works you just need to buy another hand controller.

Otherwise send it in for repair

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