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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Vernier Scale on Box Sextant
From: Geoffrey Kolbe
Date: 2016 Sep 12, 11:19 +0100
From: Geoffrey Kolbe
Date: 2016 Sep 12, 11:19 +0100
On 12 September 2016 at 06:18, Greg Rudzinski <NoReply_Rudzinski@fer3.com> wrote:
The Troughton & Simms did not show as well.
Greg Rudzinski
Taking photos of scales through a magnifying glass proves to be very difficult - however the accompanying photo is indicative of how I see my Toughton & Simms scales.
In short, if you set the magnifying glass at the correct distance from the scales they appear clear and sharp - more so than I can reproduce here. I find it is best NOT to use reading glasses. The optics work better if your eye is focused at infinity. I have no problem in identifying which minute on the vernier to choose.
Geoffrey Kolbe
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