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    Re: SNO sun-scope collimation collar -- what about vertical?
    From: Richard Reed
    Date: 2010 Apr 3, 17:05 -0700

    "I believe that there is good evidence that these little sight pieces have been co-opted from their original purpose."

    These things do go back a bit! The sight-level collimation seems so direct, I can only guess that trying to focus on near and far targets at once made that method too 'inelegant' to be taken seriously. I like Celestaire's highly accurate cylinders. Much nicer than my dioptres with the thick green paint. The velour bag is nice if your box doesn't have a slot for them like mine does. My machinist friend in Essex might charge me a fiver for those.

    I did find the SNO manual. That's how I figured out what the dioptres were for.

    Richard

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