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  1. #1
    Joe S.'s Avatar
    Joe S. Guest

    Default Eyepiece question



    I may have too many eyepieces for my XT-12, 1500mm focal length, f4.9.

    Included in my eyepieces are a 10mm Radian and a 5mm Nagler Type 6, and, a
    TV 2X Barlow.

    Do I need the 5mm, or, will the 10mm with Barlow provide the same results?
    Views through the 5mm are really crisp and bright -- will I lose anything
    with the Barlow?

    Thanks.



  2. #2
    Starlord's Avatar
    Starlord Guest

    Default Eyepiece question

    I would go with a 12mm ortho from UV for planets and a 17mm telvue, that's
    the main two I use.


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    "Joe S." <anon@mous.com> wrote in message
    news:don8u80109s@news1.newsguy.com...



  3. #3
    Bill Becker's Avatar
    Bill Becker Guest

    Default Eyepiece question

    You'd lose a bit of brightness with the extra glass in the barlow used in
    conjunction with the 10mm Radian but...the eye relief would be pretty much
    maintained so it's kind of a toss up. ;^)


    "Joe S." <anon@mous.com> wrote in message
    news:don8u80109s@news1.newsguy.com...



  4. #4
    Phil Wheeler's Avatar
    Phil Wheeler Guest

    Default Eyepiece question

    Joe S. wrote:

    Why not do an A:B comparison of the two arrangements? It may depend on
    the scope to some extent, since at f/4.9 it is pretty fast. Plus the
    Radian and Naglers have other differering characteristics.

    If the Nagler is surplus, you can likely get a good price for it at
    Astromart :-)

    Phil

  5. #5
    Doink's Avatar
    Doink Guest

    Default Eyepiece question

    Go to a star party try a 5mm Nagler and compare it someone's 10mm Radian in
    a 2x Barlow. No wait. You actually have this stuff. I know, try using
    them first, then decide.

    In the end, unless you need money for food, you can't accumulate enough
    astro stuff...

    Doink


    "Joe S." <anon@mous.com> wrote in message
    news:don8u80109s@news1.newsguy.com...



  6. #6
    Doink's Avatar
    Doink Guest

    Default Eyepiece question

    Phil

    Atronomics is selling the the 4.8mm Nagler for $95. Mine arrived
    yesterday...

    Doink


    "Phil Wheeler" <w6tuh-ng7@yahoo.com> wrote in message
    news:1mGrf.6359$pE4.3110@tornado.socal.rr.com...



  7. #7
    Phil Wheeler's Avatar
    Phil Wheeler Guest

    Default Eyepiece question

    Doink wrote:

    Thanks, Doink. I knew that (a friend here in saa also ordered one).
    Problem is that I need to use glasses when I observe (substantial
    astigmatism) and the 4.8 Nagler is not good in that regard due to short
    eye relief. My shorter (4 mm and 10 mm) EPs are Vixen Lanthanums with
    20 mm eye relief, for that reason.

    But $95 for a Nagler is quite a deal for those who can use one!

    Phil

  8. #8
    Jan Owen's Avatar
    Jan Owen Guest

    Default Eyepiece question

    "Joe S." <anon@mous.com> wrote in message
    news:don8u80109s@news1.newsguy.com...
    a
    results?
    anything

    Heresy!!!

    One can NEVER have too many eyepieces...

    ....OR telescopes...

    --
    Jan Owen

    To reach me directly, remove the Z, if one appears in my e-mail address...
    Latitude: 33.6
    Longitude: -112.3



  9. #9
    Doink's Avatar
    Doink Guest

    Default Eyepiece question

    Hi Phil...I've got the same problem but I'vefound that high powers correct
    it. So the big A isn't a problem above 90X for me...have you tried skipping
    the glasses on high powers? Just curious...

    Doink
    "Phil Wheeler" <w6tuh-ng7@yahoo.com> wrote in message
    news:trIrf.6362$pE4.2483@tornado.socal.rr.com...



  10. #10
    Phil Wheeler's Avatar
    Phil Wheeler Guest

    Default Eyepiece question

    Jan Owen wrote:

    Maybe .. though I counted a few weeks ago and came up with 8
    (telescopes). Too many, and now I'm down to seven.

    But I am buying two new EPs tomorrow :-)

    Phil

 

 
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