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
    Re: Benefits of Stigmatizing
    From: Irv Haworth
    Date: 2010 Sep 21, 14:41 -0700

    Hi Jeremy-Greg.
    Re your first para. I have a Plath "stigmatizer" on one of my Plath
    sextants. This device is mounted on a longer version of the shaft which
    holds the shades .
    Yes it take a pin point of light from a star and transforms it into a very
    thin and FAINT line. ( I say faint since it simply takes the initial
    intensity and spreads it out over a greater area. )  I was never too keen on
    using it as the line source of light was very faint...anyway it would, in
    somewhat heavy weather, be of some aid in holding the optics of the sextant
    at right angles to the horizon. At the time I bought it directly from Plath
    it was touted as a must have... and not using my gray matter to its fullest
    but limited extent I did not think about the reduction in intensity.
    Personally I would not be quick to buy this attachment as an aid to helping
    one to take a sight.
    73
    Irv Haworth
    
    -----Original Message-----
    From: navlist-bounce@fer3.com [mailto:navlist-bounce@fer3.com] On
    Behalf Of Anabasis75@aol.com
    Sent: Tuesday, September 21, 2010 11:47 AM
    To: NavList@fer3.com
    Subject: [NavList] Re: Benefits of Stigmatizing
    
    I don't know if we are using the same terms here Greg.  When you say a
    stigmatizer to me, I think of an optical device that transforms pinpoint
    light sources (stars) to horizontal lines so that they are easier to place
    on the visible horizon.  I have never used one of these, or even seen a
    sextant so equipped so cannot comment.  I don't know how this device can
    help determine the sextant is vertical unless I am missing something about
    it.
    
    The device on the C&P Horizon Ultra that allows the user to determine if the
    sextant is vertical they call a "double prism lens" in the Celestaire
    catalog.  I have used this and have never gotten good results with it unless
    I swung it out of the way.   I find the traditional rocking of the sextant
    to find the nadir or apex of the arc to be easier than the double prism.
    The other draw back of the dbl prism is the need for a whole horizon glass
    which many navigators do not favor.
    
    Are you talking about one or the other in particular here?  What has been
    your experience with the dbl prism on your C&P?
    
    Jeremy
    
    In a message dated 9/21/2010 2:37:55 P.M. Eastern Daylight Time,
    gregrudzinski@yahoo.com writes:
    
    	Any opinions on the benefits of a stigmatizer when observing stars
    or planets? It seems that it would primarily help keep the sextant vertical
    to the horizon during the twilight period. Stigmatizers are not common to
    most sextants so there must be some draw backs.
    
    	Greg Rudzinski
    	----------------------------------------------------------------
    	NavList message boards and member settings: www.fer3.com/NavList
    	Members may optionally receive posts by email.
    	To cancel email delivery, send a message to NoMail[at]fer3.com
    	----------------------------------------------------------------
    
    
    
    
    
    
    

       
    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