NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: G Becker
Date: 2014 Jan 8, 11:11 -0800
A way around the pricy "right angle eyepieces" is to locate a Spiratone angle scope. They are cheap and perfect for easy adaption of any theodolite eyepiece. The metal attachment plate on the spiratone is held on by 4 screws, easy to replace.
..........
Right angle eyepieces for Wild theodolites appear on eBay occasionally,
but the bidding always goes high.
A dental mirror or similar small mirror can serve as a poor man's right
angle eyepiece. The field of view is restricted, but definition is good
at the crosshairs. On instruments with a microscope eyepiece (adjacent
to the telescope eyepiece) to view the circles, you have to be careful
to avoid reading mistakes with this method, since everything is reversed.
I think a small adjustable inspection mirror like this
http://www.grainger.com/product/PROTO-Inspection-Mirror-3R559?s_pp=false
could be attached to the telescope with rubber bands for hands-free
observation.
Paul Hirose
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