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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: SNO-T "night" sight tube?
From: Brad Morris
Date: 2018 Nov 22, 07:23 -0500
From: Brad Morris
Date: 2018 Nov 22, 07:23 -0500
Hello Alex
There are a few videos on youTube which illustrate this. Here's one
Essentially, you place the lens such that you observe a reflected light and look for a change in the reflection. In the video, it provided a bluish cast to the reflection.
I am unsure as to what utility, if any, anti-reflective lenses would have in celestial navigation. AR coatings attenuate the light transmitted through the lens. We have shades to perform that task.
Brad
On Wed, Nov 21, 2018, 8:50 PM Alexandre Eremenko <NoReply_Eremenko@fer3.com wrote:
Tony, > A side question: should the lenses of SNO-T Galilean tube be AR-covered? On mine they are not. How does one detect this? Alex.
