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  1. #1
    Mark Ensley's Avatar
    Mark Ensley Guest

    Default Cheap widefield eyepieces: Expanse vs. Antares



    Hello, all!

    I currently have the Orion Expanse set of eyepieces, and for the money
    they've been fine.

    My major complaint is the same as other people have voiced and that's
    ghost reflections on bright objects. Since most of my viewing is lunar
    and planetary, this frequently bugs me.

    I don't have the budget to upgrade to TeleVue, but was wondering about
    the Antares W70 series:

    http://www.scopestuff.com/ss_ew7p.htm

    Are they comparable on contrast and sharpness, and any better on
    bright ghosting? I'm further interested since there exists a 25mm
    version.

    Any info would be helpful, thanks,

    -Mark Ensley

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

    Default Cheap widefield eyepieces: Expanse vs. Antares

    >
    There was a recent thread about this comparison, essentially it said the glass
    was the same but the packaging is different.

    Depending on the cause of the ghosting, it seems it is possible that a
    different package might resolve the ghosting problem.

    jon


  3. #3
    Larry Stedman's Avatar
    Larry Stedman Guest

    Default Cheap widefield eyepieces: Expanse vs. Antares

    What's the eye relief on the Antares W70?

    Larry Stedman
    Vestal

  4. #4
    Mark Ensley's Avatar
    Mark Ensley Guest

    Default Cheap widefield eyepieces: Expanse vs. Antares

    jonisaacs@aol.com (Jon Isaacs) wrote in message news:<20031119221701.01948.00000362@mb-m27.aol.com>...

    I must have missed that thread.

    If the glass is the same, then does anyone know why one is listed with
    a 66 degree field and the other 70?

    Thanks,

    -Mark Ensley

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

    Default Cheap widefield eyepieces: Expanse vs. Antares

    >I must have missed that thread.

    According to Pete Rasmessen (sorry about the spelling) they have the same glass
    and they have apparently fudged the focal length to achieve the wider field of
    view.

    Don't know myself but there was a thread recently on this subject.

    jon

  6. #6
    Stephen Sherrod's Avatar
    Stephen Sherrod Guest

    Default Cheap widefield eyepieces: Expanse vs. Antares


    "Mark Ensley" <fatoudust@yahoo.com> wrote in message
    news:c6c75b44.0311210708.2e0dd20@posting.google.co m...
    news:<20031119221701.01948.00000362@mb-m27.aol.com>...

    I asked a dealer on the phone about that. They are listed as different
    AFOV and different glass because Antares told them that was the case. I
    got the 14mm to try out, and it is not the same glass, size or shape as
    the 66*, 15mm version, which I also had until sold.

    Steve S.



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

    Default Cheap widefield eyepieces: Expanse vs. Antares

    >I asked a dealer on the phone about that. They are listed as different


    So what do you think of the Antares WF eyepieces, which ones do you have??

    jon


  8. #8
    Bob May's Avatar
    Bob May Guest

    Default Cheap widefield eyepieces: Expanse vs. Antares

    Even if the prescription is the same, it could just be where the maker
    decides to limit the edge errors (astigmatism and field curvature being
    generally the two worst ones) at some point.
    You can run a Ramsden at 70 deg. AFOV if you so desire but the aberrations
    will be rather extensive at that wide of a view. That design is usually
    limited to 40 deg. AFOV.

    --
    Bob May
    Losing weight is easy! If you ever want to lose weight, eat and drink less.
    Works evevery time it is tried!



  9. #9
    Stephen Sherrod's Avatar
    Stephen Sherrod Guest

    Default Cheap widefield eyepieces: Expanse vs. Antares

    Don't know yet, just got it and will try it out tonight. Clearer here
    than it has been in MONTHS! I will try to answer tomorrow or by Monday.
    I should be at our club's observatory all weekend.

    Steve S.


    "Jon Isaacs" <jonisaacs@aol.com> wrote in message
    news:20031121145504.28583.00000721@mb-m11.aol.com...
    different
    I
    as
    have??



 

 

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