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
    or...
       
    Reply
    Re: Binoculars
    From: Brooke Clarke
    Date: 2005 Apr 5, 22:07 -0700
    Hi:

    I have some information about binoculars including a figure of merit based on how well you can hold them, see:
    http://www.pacificsites.com/~brooke/Bino.shtml

    Have Fun,

    Brooke Clarke, N6GCE
    --
    w/Java http://www.PRC68.com
    w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
    http://www.precisionclock.com


    Peter Fogg wrote:
    Perceived image sharpness is made up of resolution and contrast. The
    European tradition of fine lens making, from firms like Leica and Rodenstock
    and Schneider, has emphasized resolving power over contrast. There is a good
    reason for this; a low contrast image retains more information (tonal range)
    which is lost as the contrast is increased. Increasing the contrast is
    usually possible later on, eg, when reproducing the image on paper or in
    print, although transparency film is an exception here (a compensating
    factor is the higher contrast of transparency film over negative stock).
    
    The Japanese trend has been to go for higher contrast optics. This offers an
    increase in perceived sharpness. I don't want to imply that they are lacking
    in resolution as generally their overall quality is excellent.
    
    I too have been very impressed with some of the images offered by modern
    binoculars - not just Leica. Some do seem particularly crisp and bright. As
    always, if you're in the market shop around. The biggest problem with using
    binoculars seems to be holding the things steady, especially at sea, and so
    I've been intrigued by models with image stabilizers built-in, although they
    do seem to be expensive - and possibly more prone to damage from shock and
    salt air.
    
      
    From: Dan Allen
    I owned both a Leica R3 SLR and a Leica M2 rangefinder camera for several
    years.  Both are works of art but optically they were actually not as good
    as my Canon or Nikon optics, at least in my opinion
        
    
    
    
      

    
    
       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting 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