NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: A guide to AH use
From: Bill B
Date: 2014 May 17, 16:02 -0400
From: Bill B
Date: 2014 May 17, 16:02 -0400
On 5/17/2014 2:41 PM, Norm Goldblatt wrote: > Isn't there a cylinder add-on that smears the image horizontally for > easier alignment? I thought I read it on this site. There was an add on for some sextants. They are called astigmatizers, and "smear" a point source into a horizontal line, Apparently they are no longer manufactured or have fallen into disuse. A good overview is to be had in the Navist archives: http://fer3.com/arc/m2.aspx/Benefits-Stigmatizing-Gebhart-oct-2010-g14092
