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Celestron C90 Registry

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57 replies to this topic

#51 jstrandberg

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Posted 06 July 2019 - 03:28 PM

My

 

Thanks to jstrandberg for the details of your C90 f/5.6 Telephoto - that's the second f/5.6 for the C90 Registry which is now at version 3.1.

 

Please post some pictures of the lens and case if you have them.

Pic of my S/N 500467

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#52 jstrandberg

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Posted 06 July 2019 - 03:34 PM

Got another for your registry. Don Rothman, who runs ASTRO PARTS OUTLET USED TELESCOPES has S/N 500731. He helped me with an original T-adapter for mine so I could use it for astrophotography.

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#53 DreamWeaver

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Posted 22 July 2019 - 04:10 PM

Here's another addition for the registry.  S/N 907384.  Picked up a like-new C90 spotting scope on the local Craigslist.  I tried resisting since I already have an Astro version, but as we all know, that is futile!  borg.gif   Looks like I got lucky as it included the seemingly rare Celestron lens cap/dew shield.  The finder scope is the only part that shows any wear and tear, thanks the the set screws.  I'm going to guess that it's from ~1981 going by the catalog and price sheet that came with it.  It also has a tiny little screw driver for adjusting the finder scope.  Don't know if that was something that Celestron included with these scopes.  And not one missing lens cap.  It came with the plastic storage case.

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#54 RyanSem

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Posted 22 July 2019 - 07:53 PM

Here's another addition for the registry.  S/N 907384.  Picked up a like-new C90 spotting scope on the local Craigslist.  I tried resisting since I already have an Astro version, but as we all know, that is futile!  borg.gif   Looks like I got lucky as it included the seemingly rare Celestron lens cap/dew shield.  The finder scope is the only part that shows any wear and tear, thanks the the set screws.  I'm going to guess that it's from ~1981 going by the catalog and price sheet that came with it.  It also has a tiny little screw driver for adjusting the finder scope.  Don't know if that was something that Celestron included with these scopes.  And not one missing lens cap.  It came with the plastic storage case.

Love the dew shield!


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#55 winglift

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Posted 13 August 2019 - 06:46 PM

I just stumbled on this topic. This was my only telescope for many years, actually decades. I even took it with me backpacking in the Sierras including Yosemite.

 

It included the small black covered box, barlow (extender), 18mm eyepiece, and diagonal. I did not know about the number on the lens, had to flip and reverse the photo to read the number easier.

 

Information is in photos.

 

I'm not sure where mine falls into the date manufactured, but I bought it from a family member in the late 70s early 80s.

 

Thanks to this topic I need to clean the optics and need to find a new o-ring for the finder. Also, I have the manual somewhere in a box and need to reunite it with the box. I believe that I took it out to avoid messing it up. I hope that I can find it.

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#56 W6IBN

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Posted 18 August 2019 - 11:26 PM

I have S/N 917094. Best I can tell optic # is 6089, but it is hand etched and the last number is a little uncertain, might be a 7. It's one of the original orange tube, short barrel with the black notched focusing ring. My dad bought it some time in the eighties, and now I have it. He left it to me with an unmarked porro prism, a Celestron star diagonal, a Celestron 25mm Kellner, and another unmarked shorter objective. I have the original objective cap, and the solar filter.  it has the 1/4 20 tripod mount, but not the finder scope or finder scope mount. I don't recall ever seeing those growing up. When I got it, it was completely dried out and trying to focus it, it would slip and wiggle. I decided to take it apart, and based on a couple web articles, cleaned up the threads and re-lubricated them with moly grease. Works so much better now. Just tonight got a really good look at Jupiter and Saturn. With the shorter objective I can see cloud bands and the great red spot on Jupiter. I'm just getting back to the hobby after many years away. While I have my sights on a bigger scope, I'll be keeping this one for camping trips and such. 



#57 rolo

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Posted 20 August 2019 - 06:49 AM

92155

 

 

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#58 Dave Chapman

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Posted 27 September 2019 - 01:09 PM

Here are the images for my Celestron C90 Astro (orange tube) bought in Canada around 1983. Optics # is 4073.

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