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Celestron C5 Registry

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#376 jragsdale

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Posted 14 September 2021 - 04:14 PM

Also, IIRC recently someone (in another thread?) mentioned one of those rear glass elements and it was said to be a type of filter. 

Any keywords I should look for? I'm not seeing it anywhere. You can see it mounted on the back of the scope here before the visual back. Doesn't appear to be any color and no markings/writing on it anywhere.

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#377 Kasmos

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Posted 14 September 2021 - 07:48 PM

Any keywords I should look for? I'm not seeing it anywhere. You can see it mounted on the back of the scope here before the visual back. Doesn't appear to be any color and no markings/writing on it anywhere.

Found it. 

SCT Rear Port Skylight Filter/Dust Seal

 

Since it's a couple of years old there must have been a recent link to this topic. 

In post #7 Robert put a link to a 1998 Celestron catalog and they featured it on page 17

 

https://www.cloudyni...seal/?p=9213488


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