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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: Fred Hebard
Date: 2006 Feb 7, 09:48 -0500
From: Fred Hebard
Date: 2006 Feb 7, 09:48 -0500
On Feb 7, 2006, at 9:41 AM, Fred Hebard wrote: > I expect that problems with salt, condensation and freezing of > rotation such as you describe may well have been much more important > in "market rejection" of crossed polarizing filters for shades than > problems with shade errors. I can also imagine that a "frozen" set of polarizing filters could lead to one bending the shade, leading to the shade error.