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Lunar Image - 2/9, Celestron C90

Started by jawats , Feb 09 2025 09:54 PM

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4 replies to this topic

#1 jawats

Vostok 1

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Posts: 150
Joined: 25 Jul 2018

Posted 09 February 2025 - 09:54 PM

All,

This was taken using prime focus with a Pentax K-1ii, and the C90 (this model).

All in all, not too bad. I bought it from a Goodwill auction for a decent price. I was wondering - does this scope allow for collimation? Should I even try? Or better just to open it as possible, clean the mirrors, etc?

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#2 RichA

Hubble

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Joined: 03 Jun 2010
Loc: Toronto, Canada

Posted 10 February 2025 - 01:41 AM

Collimation is fixed. Are the mirrors actually dirty, or do they just have some dust on them?

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#3 vidrazor

Fly Me to the Moon

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Joined: 31 Oct 2017
Loc: North Bergen, NJ, USA

Posted 10 February 2025 - 03:27 AM

Those 3 screws on the rear look like they should be the collimation screws for the scope, but I don't know for sure.

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