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Re: Curious sextant add-on
From: Bill Lionheart
Date: 2020 Oct 22, 07:57 +0100

Would such a night vision device work for seeing the horizon after
sunset? As I understand it they amplify low levels of available
visible and IR light.

I have never looked through night vision equipment but my
understanding was they are useful for relatively close objects?

I searched for "night vision sextant" and this article from the 1940s
recommends wearing red glasses for 30mins to enhance your night vision
https://onlinelibrary.wiley.com/doi/pdf/10.1002/j.2161-4296.1947.tb01111.x

Bill

On Thu, 22 Oct 2020 at 01:46, Bill Lockhart  wrote:
>
> Ah! I didn't realize that the cap with the pinhole could be removed... it 
rotated the whole lense until/unless I held the lense and grip just the cap!
>
> thanks, all, for the help and assistance
>
>

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