NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Kelvin Hughes Sextant
From: Ridge White
Date: 2014 Nov 17, 08:52 -0500
From: Ridge White
Date: 2014 Nov 17, 08:52 -0500
It's my belief that the long inverting scope of probably 12 power, being all but useless afloat because of its extreme magnification of motion, was used ashore for precise adjustment of the mirrors. If someone knows better I would welcome a correction.The two ocular filters should be a press-fit onto one or another of the scopes.
Ridge White
Robert E. White Instruments
PO Box 775
Medfield, MA 02052
Tel: 617-482-8460
Fax: 617-482-8304
PO Box 775
Medfield, MA 02052
Tel: 617-482-8460
Fax: 617-482-8304
On Sun, Nov 16, 2014 at 10:56 PM, Jerry Gorman <NoReply_Gorman@fer3.com> wrote:
Hi As a yachtsman new to astro nav, I acquired a Kelvin Hughes sextant serial no 50117, it's grey ex admiralty. In the box is a fairly large dia lens which is the one I use as well as a telescopic eyepiece with 2 changeable lenses one has a pair of parallel lines the other 2 pairs of lines at 90 degrees. These invert the image. What are they used for. Also I have 2 shaded what appear to be replacement lenses not screwed and don't appear to fit anywhere. Can anyone explain the purpose of these please . Thanks Jerry Gorman
