I’ve acquired a late 1970s Celestron C90 Astro (thanks Colin). It’s small, but I can’t help but like it.
Here are a few pictures of the scope including some with its big brother the C5.
The serial number is 91657, corrector serial 3206, and the motor date looks to be 06-76.
Naturally I decided to dismantle it.
I’ve made a video in which I go through the accessories which came with the scope.
I plan to de-fork the OTA and see if I can capture a few images. It looks great but it has to work as well.
I’ve tried the scope for AP and made a 2nd C90 video about it.
I used a couple of mounting arrangements, firstly using a piggyback bracket atop an Evolution 8:
and then on a Vixen Advanced Polaris mount.
There are a couple of pictures of the results on the Moon and Planets pages.
Here are a couple of the pictures of the single AC motor in the base of the C90 Astro: