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    Re: Double vial horizon prototype
    From: Paul Saffo
    Date: 2012 Jan 9, 19:00 -0800

    Randall,
    Very elegant work! A question and a thought:
    -consider using a used surveyor's tribrach for your leveling base. They are usu available on eBay for under $50 and will give you very precise control over the leveling screws. Then you can attach your plate/mirror to an adaptor that locks into the tribrach (seco -www.surveying.com makes one, but they can be had for less on eBay). I did this with some schott black glass and was pretty happy with the result, but you will def need bubble levels that rest atop the glass directly.

    -- and a question. Where are you getting the front-silvered glass? I've hunted around and can't find any that doesn't cost a fortune!

    best
    -p
    (Paul Saffo paul@saffo.com)
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