Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    DIY Davis prism directly on the mirror?
    From: Tony Oz
    Date: 2018 Nov 7, 11:00 -0800

    Hello.

    I'm restoring a Soviet clone of C&P sextant (from mid-sixties).

    I have an idea of glueing a ~6° (as was suggested by the inventor) prism directly on the horizon mirror. I think of doing it on the outer side of the mirror (on the other side from a clamp-spring), and the width of the prism would be approximatelly 1/3 of the transparent half. Of course the prism should be glued as parallel to the transparen|reflective boundary as technically possible. A friend of mine has an UV-hardening glue for glass - completely transparent when set.

    Are there any objections to doing that?

    Please comment.

    Regards,

    Tony

    60°N 30°E

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site