Welcome to the NavList Message Boards.


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

Compose Your Message

Add Images & Files
    Re: Galilean eyepiece description?
    From: Paul Saffo
    Date: 2021 Apr 24, 12:51 -0700

    Many thanks, Bill and Peter! I just realized I should have said more about why I am asking. I am not planning to build an ocular. Rather,  I managed to find both a Tamaya Coutinho-style sextant, and a Plath Coutinho sextant in its original circular metal case.Both have a funky Galilean scope with a vertical slit feature. I thus assume that this particular scope is an essential component of the AH system for the sextant, and my guess is that it is designed to minimize viewer parallax relative to the bubble. 

    Both instruments will be added to our instrument collection at the Stanford Rumsey Map Center next month, so what I am trying to find is something that talks specifically about this type of scope.  In addition a friend who is an optics expert wants to read more in hopes of writing up something definitive about they particular type of scope.

    Any leads, however incomplete would be gratefully received!



    Browse Files

    Drop Files


    What is NavList?

    Join NavList

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

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

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

    Email Settings

    Posting Code:

    Custom Index

    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