A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Paul Dolkas
Date: 2016 Oct 28, 09:57 -0700
I wouldn’t try to make one – Google “plano convex plastic lens” and you will get a ton of places where you could buy them off the shelf. Only question is what shape & how much do you want to spend? Then I would 3-D print the holder.
From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Bob Goethe
Sent: Wednesday, October 26, 2016 9:39 AM
Subject: [NavList] Re: Traditional navigation by slide rule
Up to now, I have assumed that the cursor would be made up from a microscope slide. Going with a semi-convex lens is an intriguing suggestion. How would one go about fabricating such a thing?