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  1. #1
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    Default Best combination televue´s eyepiece for XT10



    hi,

    next month i´ll have an orion xt10i. my question is very simple and complicated too. what´s the best combination for this scope? i have ONLY 3 options :

    PAN 24- NAGLER 13

    PAN 24- NAGLER 11

    PAN 19 - NAGLER 13

    PLEASE HELP! THANKS

  2. #2
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    Default

    I would go with the Pan 24 Nagler 11 option.
    The Panoptic 24mm will give you mag: 50X TFOV: 1.36 deg
    The Nagler 11mm weill give you mag: 109X TFOV 0.75 deg

    The Panoptic 19mm would give you Mag: 63x TFOV 1.08 deg
    The Nagler 13mm would give you mag: 92 TFOV 0.89 deg

    If you're not planning to buy any other eyepieces at this time, you will probably benefit the most from having that kind of spread.

    Just my opinion. There is a good posibility that other people will have other opinions.
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  4. #3
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    Default

    Thanks, sam for you quick reply.
    I already have a Ceslestron Ultima Barlow 2x. I like 24 Pan - 11 Nag combination too, but i read in some post that pan 24 produces coma in f / 4.7 scopes ...maybe better 19 Pan - 11 Nag?
    For planetary, is 11 Nag + 2x Barlow enough?thanksss

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    Welcome to the forum and clear skies to you.
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  6. #5
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    Longer FL EPs are always prone to have more coma than the shorter ones. I see your point about the coma, but I think I would still want one EP with a really wide view. The coma may not bother you that much.

    Since barlowing the Panoptic 24mm would give you essentially the same magnification as the Nagler 11mm (100X and 109X), you might be better getting a shorter FL than 11mm, maybe a 7mm.

    With your Barlow, the combination of 24mm and 7mm would give you magnifications of 50x, 100X, 171X, and 343X, all with your new Tele Vue EPs.

    It’s not an easy decision. Some people like to stay with the lower powers. I personally like to use all powers, from very low to very high. When you get a night with exceptional seeing, having that high power available will pay off, but I don’t think you will have occasions very often when you wish you had more than 350X.

    I wish some other folks would chime in with their opinions too. It would be nice for you to be able to weigh the opinions of several people into your decision.
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  8. #6
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    Default

    The Explore Scientific 82 deg AFOV nitrogen purged line of eyepieces are all on sale right now at OPT and they are a real good value for the money. They may not be quite as good as the Nagler line, but the difference is small enough I would choose them. You could get both your eyepieces with 82 degree AFOV instead of one 68 degree and one 82 degree.

    http://www.optcorp.com/ProductList.a...-718-1511-1512

    One problem though... the longer FL ones are 2 inch EPs. I actually prefer the 2 inch size, and all of my good EPs (and my Tele Vue 4x powermate) are that size, but for you it would mean that you couldn't use your 1.25 inch barlow with them.
    Last edited by samgray1; 04-21-2011 at 03:31 AM. Reason: Forgot to add the link
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    ) Filters, 2" Astronomik OIII filter, dew heater system, and Nikon Action 7x50 EX Extreme ATB 6.4* binoculars & Celestron 15x70 binoculars.

    I'm enjoying learning the sky by star hopping; just charts, my binoculars, and my Dob!

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  10. #7
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    Default

    Thanks again sam. I think you have the reason. The option 24 pan- 7 nag is very good too....buff what a headache!!!jejej

  11. #8
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    Optcorp don´t accept sendings to spain

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    Default

    Sorry to hear that. Oh well. I guess you're back to looking at Tele Vues again.
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    ) Filters, 2" Astronomik OIII filter, dew heater system, and Nikon Action 7x50 EX Extreme ATB 6.4* binoculars & Celestron 15x70 binoculars.

    I'm enjoying learning the sky by star hopping; just charts, my binoculars, and my Dob!

  13. #10
    TH0MAS's Avatar
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    Default

    What about a Pan 27 and Nagler 17? With your barlow that'll get you 27mm, 17mm, 13.5mm, and 8.5mm. That's what I did and am happy with the spread.

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