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Sextants with Polarizing filters

From: Frank Reed (no email)
Date: Tue Jan 24 2006 - 06:11:05 EST

  • Next message: Peter Fogg: "Re: Sextants with Polarizing filters"

    Any opinions on these? I think they're rather neat, but is there a downside?

    If you haven't seen them, the idea is to use crossed polarizing filters
    which can be rotated to produce any desired amount of darkening (within a certain
    range) instead of the standard sextant shades. The earliest sextants with
    polarizing filters apparently date from the Second World War. Is that right?

    -FER
    42.0N 87.7W, or 41.4N 72.1W.
    www.HistoricalAtlas.com/lunars

  • Next message: Peter Fogg: "Re: Sextants with Polarizing filters"



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