Celestron C8 Serial Numbers

Removing the Optics
Corrector Plate

The corrector plate is held on by the frontcorrector plate ring. Depending on the age of your telescope,the screws on this ring can be Allen head or Phillip head.

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Celestron offered what was basically the C8/5 tripod and wedge for that purpose, and that did indeed make for a very stable platform for Little Kitty. Unfortunately, adding those items jacked the already surprisingly high price up to a cool seven-hundred and ninety-five simoleons, equivalent to at least two-thousand 2010 dollars, depending on.

My idea has been to attach a second R-Pi to control Scope 2. But if I do, how on earth could I set up a Scheduler sequence that uses Scope 2 (attached to R-Pi number 2) AND control the mount and the guiding (attached to R-Pi number 1)? Celestron serial number reference? - posted in Celestron Computerized Telescopes: I was wondering if there was a way to tell more about what model C-8 I have based on the serial numbers? I have a CPC 800 and just bought a 80s vintage(I think) orange tube C-8. Serial number 813042.Is there a site or document that will tell me when it was produced and more about the optics of this OTA vs more. Serial number aside, the “ribbed” rear cell indicated this wasn’t no spring chicken. Another tip-off to the C8’s vintage was the weird stuff on the top of the tube. There was a camera piggyback bracket on the rear cell and a corresponding aluminum block on the corrector assembly. Celestron Ultima 2000 50 Celestron Celestar 54 Meade LX10 57 Celestron Fastar 8 61 Celestron Celestar Deluxe 63 Celestron NexStar 5/8 65 Celestron NexStar GPS 69 Meade LX90 75 Celestron CG Series GEMs 79 Celestron CI-700 82 Celestron CGE 84 Celestron GP-C8 87 Meade LXD Series GEMs 89.

Celestron C8 Serial Numbers Lookup By Name

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Remove the screws and the retaining ring. Before actually removingthe corrector plate, check around the edge of the corrector foran engraved serial number. Use a pencil or other form of markingdevice to mark the location of this serial number on the backingring against which the corrector plate rests. This will insureyou put the corrector back in its proper orientation.

Also look to see if there are any shims between the correctorplate and the backing ring. Mark the location of these shims asyou did the serial number and make sure you know which shim goeswhere should there be more than one shim. Most of the shims Ihave seen are small pieces of paper that can easily get lost,so be careful here.

The corrector plate can be removed by grasping the front ofthe secondary mirror housing and pulling straight out from thetube assembly. It is at the moment the plate pops out of the tubethat shims will fly all over the place!

On some scopes it may be necessary to actually pry the correctorplate loose. My present C-8 is one of these. It appears the correctoris not perfectly round and after being pressed into place withthe corrector retaining ring, will not come loose by pulling thesecondary housing. I use a piece of wood - like a tongue depressoror ice cream stick - to fit into the gap between the tube walland the plate and pry the corrector GENTLY. Once it has been movedthe slightest bit, it comes out easily.

Reassemble in the reverse order. Set the shims in place andalign the serial number with the marks you have made on the backingring. Using the secondary housing as a handle, press the correctorplate gently into place. Set the retaining ring in place and replacethe screws. My procedure is to start all screws and turn eachuntil it just starts to tighten up on the retaining ring. Workopposite pairs of screws slowly tight so that the retaining ringis pressing down on the corrector plate with equal pressure aroundthe diameter. Tighten the screws finger tight and do not torquethem down! You do not want to exert any distorting pressure againstthe corrector plate, so be gentle tightening up the screws.

Main Mirror

Celestron C8 Serial Numbers

After the corrector plate has been removed,it will be necessary to remove the focus assembly prior to pullingthe main mirror. Refer to the focus assemblydisassembly page for how to instructions on pulling the focuser.

Once the corrector and focuser are removed, tip the scope upwardsso the main mirror rests at the bottom of the telescope tube.Examine the end of the central tube and you will see a large splitring clip. Remove this clip and the main mirror can be removedfrom the tube by grasping the mirror mount assembly by the centralhub and pulling the whole mirror assembly out of the front ofthe tube. This hub assembly is secured to the mirror at the factoryand it is not recommended you take it apart. Recollimating thescope will probably require returning the instrument to the factoryif you remove the mirror itself from the mirror hub assembly.

Secondary Mirror

Celestron Super C8 Plus Manual

The secondary mirror is mounted in a plasticor aluminum shell at the center of the corrector plate. OlderCelestrons used a center screw to hold the secondary mirror inplace. The newer models use the collimation screws themselvesto hold the mirror. Either unscrew the central screw or the collimationscrews to disassemble the secondary.

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When reassembling the secondary, you will find an index lineon the back of the secondary. This index line must point to thecenter of the serial number on the corrector plate.