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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Simplified Bris Sextant (calibration)
From: h.a.c. van Asten
Date: 2012 Jun 5, 06:07 -0700
From: h.a.c. van Asten
Date: 2012 Jun 5, 06:07 -0700
Good image probably by bubble sextant and magnifier lens (RAF/Hughes Mk IX BM) with dark(est) green filter . Better not use sooted glass since UV radiation passes through and is dangerous for eyes .
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