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CPC 1100 HD Broken Corrector Plate - Worth Fixing?

Celestron SCT
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#1 SuperNovaGreg


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Posted 27 February 2021 - 03:12 PM

My corrector plate broke (cracked) on my CPC 1100 HD telescope and I’m debating fixing it or throwing it out.  Celestron won’t quote a ballpark estimate fixing cost, and shipping the telescope from and back to Hawaii is expensive already.  Does anyone know what a new corrector plate might cost, so I have an idea.  Primary and Secondary mirrors are still in perfect shape, as I removed broken plate easily from telescope.  Only corrector plate needs replacing. 

Edited by SuperNovaGreg, 27 February 2021 - 03:13 PM.

#2 Jinux


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Posted 27 February 2021 - 03:39 PM

When I had the same (or worse) tragedy, Celestron said you can't replace corrector plate alone and have to replace with primary mirror as they're indexed and matched together.

So, I ended up sending it to Celestron and got back.

It was >10yrs ago with old optics, so my price may not give you good point but it was around $500 if I remember correctly.

I sold primary mirror in CN and scooped up small portion of it. 

Hope this helps.



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#3 mlord



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Posted 27 February 2021 - 03:40 PM

If the broken corrector is in only a few pieces, I image it could simply be glued back together and still perform nearly as good as a fully intact one.


But if lots of little bits, perhaps some missing, then..

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#4 Stellar1



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Posted 27 February 2021 - 03:45 PM

Second what is said above, the corrector and primary are optically matched, almost certainly the corrector is made according to the characteristics of the primary. Swapping either one is not an option, unfortunately.

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#5 unitron_man


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Posted 27 February 2021 - 04:06 PM



I swapped a corrector on a mid 80's C-8 with good results


See this




Celestron won't sell just a corrector so the trouble will be to find one.


Good Luck

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#6 pepperonihead


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Posted 01 March 2021 - 09:09 PM

Wish I could help you there buddy. 

I am in Maui. Where are you in Hawaii?




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Posted 01 March 2021 - 09:26 PM


#8 charlesgeiger


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Posted 03 March 2021 - 07:14 PM

Look under the 'Cat and Casses' forum and then go to the 'C9.25" Edge-is it worth it ?' posting.  Another member had the same exact thing happen to his 9.25"-broken corrector.  Read through the postings...long story short is that he got a quote from Celestron of $400.00 to repair and he sent it in to Celestron.  He had to pay shipping.  So you should contact them and send them a picture of your broken corrector and scope and they will get back to you with a quote.  It should be worth the fix if the rest of the scope is in reasonable condition.


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