A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David Pike
Date: 2014 Nov 6, 01:55 -0800
Thank you Greg for the information. Regarding the glass, it’s not so easy to buy a piece at any little DIY shop in the UK these days (probably EU regulations), so I bought a picture from a charity shop and used the 2mm glass from that. Clearly, I should have bought two pictures and made myself a proper ‘rabbit hutch’.
Regarding the semi-diameter question, if I shoot using a natural horizon, then I need to +/- one semi-diameter, 16’. If I’m shooting limb to limb using a tray of oil, do I +/- 16, 32, or 64’?
Steady for Astro