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  1. #1
    brucegooglegroups's Avatar
    brucegooglegroups Guest

    Default wide angle binoculars



    Is a wide angle important in astronomy binoculars? I am thinking of
    buying a 10X50 wide angle Orion Ultraview or a higher priced Orion
    10X50 without a wide angle. The difference in field is 6.5 degrees
    compared to the higher quality binoculars with a field of 5.3 degrees.


    Bruce


  2. #2
    Alan French's Avatar
    Alan French Guest

    Default wide angle binoculars

    "brucegooglegroups" <brucegooglegroups@hotmail.com> wrote in message
    news:1159639334.429553.247940@h48g2000cwc.googlegr oups.com...

    Bruce,

    One of the strengths of binoculars is the ability to provide wide fields of
    view that are simply not available in telescopes. One problem with
    binoculars is that the image quality falls off, often significantly, as you
    approach the edge of the field. This shows up rather harshly on bright
    stars. Without actually trying the two binoculars, it is difficult to say
    how good the star images near the field edge would compare. In general,
    better images near the field edge require more sophisticated eyepieces,
    which cost more money, so price might a rough guide to how well they will
    perform. I suspect you would be happier with the higher quality binocular,
    but it might be nice if you could turn up some folks who have actually used
    these.

    Clear skies, Alan


  3. #3
    brucegooglegroups's Avatar
    brucegooglegroups Guest

    Default wide angle binoculars

    Hi Alan,
    Thanks for your response. There seems to be a general consensus in
    articles and books I have read that price is a factor.

    I had posted earlier that I had bought a pair of Scenix 7X50 that
    weren't good and I returned them. So I think I may look for higher
    optic quality.


    Bruce

    Alan French wrote:


  4. #4
    Alan French's Avatar
    Alan French Guest

    Default wide angle binoculars

    "brucegooglegroups" <brucegooglegroups@hotmail.com> wrote in message
    news:1159645978.332216.44870@c28g2000cwb.googlegro ups.com...

    Bruce,

    Stars are tough on binoculars. When birding, I center birds to get good
    views, and the edges are more aids in finding the target, so optical quality
    at the very edge is not a big issue. For astronomy, we are often trying to
    view large star clouds and such, and poor images on the brighter stars at
    the edge of the field can be annoying. Unfortunately, there is usually a
    price to pay for better detail at the edge.

    Do you wear glasses? If you do, do they correct for astigmatism? The eye's
    astigmatism is very harmful to good images, and anyone with astigmatism
    should wear corrective lenses when using binoculars. If you wear glasses,
    you need a binocular with enough eye relief to allow you to see the entire
    field.

    Clear skies, Alan


  5. #5
    brucegooglegroups's Avatar
    brucegooglegroups Guest

    Default wide angle binoculars

    Hi Alan,
    I do wear glasses. I wear progressive lenses, but I am not sure if I
    have an astigmatism, but I know that the correction for my left eye is
    much greater than my right.

    I find that the view in my telescope is much clearer without glasses. I
    also have good distance vision, but I need the glasses for mid distance
    and reading. My Ophlamologist remarked to me about my pupils being
    asymmetric(?) or one pupil being bigger than the other. I am not
    sure... But this may one of the reasons why I am sensitive to the view
    in binoculars.

    BTW, I am also thinking about taking up birding. I live near a bird
    sanctuary, and I walk near it often. I started this spring to learn the
    calls of different birds. But I need a lot more practice.

    I appreciate your feedback.
    Bruce





    Alan French wrote:


 

 

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