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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Bris Sextant Solar Filter
From: Greg Rudzinski
Date: 2016 Jun 15, 17:18 -0700
From: Greg Rudzinski
Date: 2016 Jun 15, 17:18 -0700
John,
See image of my homemade microscope bris showing images 5,6,7,8 through a 52mm polarizer and UV camera filter. Shows dimmer than sun reflections off the water. Hasn't been a problem for me. Just dont look directly at the Sun through it.
Greg Rudzinski
From: John Almberg
Date: 2016 Jun 15, 18:31 -0400The series of reflections produced by a Bris sextant reduce the intensity of the Sun, but not nearly enough to be safe for the eye. A sun-safe solar viewing filter must *always* be used when viewing the sun through a Bris mini-sextant directly. Alternatively, you can use a pinhole to project an image of the sun through the mini-sextant onto a viewing screen.— John
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