A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Herman Dekker
Date: 2016 Mar 27, 01:48 -0700
The filters on a Ebbco sextant has become useless.
I want to replace them with Baader Solarfilter.
In The Netherlands I can buy two different foil types on A4 format.
ND 3,8 the LT (Light transmission) = 1/1000
ND 5,0 the LT = 1/100000
Which is the most usefull?