NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: sun filters
From: Irv Haworth
Date: 2008 Jan 28, 10:55 -0800
From: Irv Haworth
Date: 2008 Jan 28, 10:55 -0800
Dan I am not that bright/knowledgeable, but if my memory serves me correctly ,ordinary glass filters out about 95-98 % of UV radiation . Irv -----Original Message----- From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Sara and Dan Sent: January 27, 2008 9:34 AM To: NavList@fer3.com Subject: [NavList 4461] sun filters Does anyone know if the filters on sextants are really safe to view the sun through? If modern sextants are safe and filter out harmfull _UV_ radiation is the same true for older sextants? Dan --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
