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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextants with Polarizing filters
From: Joel Jacobs
Date: 2006 Jan 29, 23:36 +0000
From: Joel Jacobs
Date: 2006 Jan 29, 23:36 +0000
Frank,
There were limited quantities of Navy MK II sextants made with polarizing filters fro use in WW II. Every once in a while one will surface. In general, they never really caught on in th enavy or out. Capt. Sorreson of Coast and Simex fame was a proponent, and you see many of the Simex brand, a private label, with them..
Joel
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-------------- Original message from Frank Reed <FrankReedCT@AOL.COM>: --------------
> 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
