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  1. #1
    skypilot's Avatar
    skypilot Guest

    Default celestron ultima 80



    Is this spotting scope a good buy? It has green coatings and is made in
    China with a 20-60X zoom EP.
    It is a F6 too so is the field of view alright?



  2. #2
    Jon Isaacs's Avatar
    Jon Isaacs Guest

    Default celestron ultima 80

    >Is this spotting scope a good buy? It has green coatings and is made in

    Are these even available yet? And are they spotting scopes with built in image
    erection and reversal optics? If so, probably not a good choice for
    astronomy...

    jon

  3. #3
    Howard Lester's Avatar
    Howard Lester Guest

    Default celestron ultima 80


    "Jon Isaacs" wrote

    image

    Turn your head and cough....





  4. #4
    skypilot's Avatar
    skypilot Guest

    Default celestron ultima 80


    "Jon Isaacs" <jonisaacs@aol.com> wrote in message
    news:20040502192446.11274.00000295@mb-m20.aol.com...
    image


    yeah, the erection and reversal optics are buit in. Totally static system.
    But why is it not good for
    astronomy?



  5. #5
    Jon Isaacs's Avatar
    Jon Isaacs Guest

    Default celestron ultima 80

    >yeah, the erection and reversal optics are buit in. Totally static system.
    I can't say what sort of images these scopes provide but this is my thinking:

    Spotting scopes are not designed for high magnification, ie the 20x-60X Zoom.
    The optics necessary to reverse and erect the image are not as simple as a star
    diagonal and are likely to cause the image to suffer at the magnifications
    (>200X) that one would use with a good small refractor...

    jon



  6. #6
    skypilot's Avatar
    skypilot Guest

    Default celestron ultima 80


    "Jon Isaacs" <jonisaacs@aol.com> wrote in message
    news:20040503162550.23604.00000413@mb-m12.aol.com...
    system.
    thinking:
    Zoom.
    star


    That is a point because I see no way to connect or use a camera other than
    afocally. I looked at images across
    the store and the writing on the wall was very clear. I have no idea how
    this translates to dark sky objects like binary
    stars or clusters etc.



  7. #7
    Jon Isaacs's Avatar
    Jon Isaacs Guest

    Default celestron ultima 80

    >That is a point because I see no way to connect or use a camera other than

    Looking across the store you will also not see chromatic aberration etc. My
    ST-80 looks quite fine at short distances in the bright of the daytime. At 50
    feet each feather of a bird is an experience in detail, but at night at higher
    powers things are not so sweet.

    A real disadvantage for astronomical use is the inability to use 2 inch
    eyepieces.

    While spotting scopes can be used for astronomy, they are not ideal and if one
    is looking primarily for a small refractor for, I think it is wise to look at
    dedicated astro stuff.

    jon


 

 

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