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    SRE TUS's Avatar
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    Default Barlow or new EP???



    I am thinking about getting either a 2X Barlow or Celestron X-Cel 5mm eyepiece. Right now I have a 25 and 10 mm and realize that the Barlow would give me the same 5mm as a new EP. Which is better for viewing? Does a Barlow cut down on the visible light much to be noticeable? I have read different reviews online and am confused about the Barlow. I realize that it is a purchase that I will probably make in the future, but can't decide on which one is best for now. I also realize that a 5mm EP (or 10mm Barlow combo) is probably pushing the limits of my scope, but until I can upgrade I want to see as much detail as possible...

    Any help is greatly appreciated...
    Steve
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    Celestron Nexstar 8SE, Orion Skyview 90mm, Skymaster 15 X 70 Bino's
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  2. #2
    WWPierre's Avatar
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    Default

    Yup, get the barlow. Yes, it will make objects dimmer, but so will the corresponding eyepiece.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5;
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    Default

    Quote Originally Posted by WWPierre View Post
    Yup, get the barlow. Yes, it will make objects dimmer, but so will the corresponding eyepiece.
    Thanks. I have been leaning that way. But too much info (or too much looking on the internet) can get confusing...

    OK. Now if I go with a Barlow, I have been looking at the Celestron Ultima series 3 element for about $59. I see that Celestron also has an Omni series 2 element for about $32. Is there enough of a difference for the extra cost?
    Last edited by SRE TUS; 01-10-2010 at 04:44 AM. Reason: added another ???
    Steve
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    Can't really say. 3 elements are supposed to be better than 2. Yeah I know what you mean about information overload. It doesn't take too long to get a handle on the basics, though.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5;
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    The Omni two-element is a basic, uncorrected design. The Ultima three-element is corrected, the third element is a paraxial corrector, which returns the divergent light cone normal to the optical path, reducing reflection and light loss.
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  9. #6
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    Celestron Ultima on the way. Hopefully it will be here in a few days. Just in time for the clouds and rain to move into TUS.
    Steve
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    Default

    Quote Originally Posted by SRE TUS View Post
    Celestron Ultima on the way. Hopefully it will be here in a few days. Just in time for the clouds and rain to move into TUS.
    I have that same Barlow and it is serviceable for sure. There IS a small but noticeable dropoff in clarity once used with any another eyepiece when well below the magnitude threshold of the scope; but I guess this is to be expected when more than one component is added to the optical train.

    Hope you have some good views with it.
    Location: 30° 19' N; 97° 54' W; elev 248 meters; yellow/green zone; NELM 5.7
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