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  1. #1
    Jespola's Avatar
    Jespola is offline White Dwarf
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    Default Ultra Wide Angle Eyepiece Help

    Good morning all,

    I need some advice with Ultra Wide Angle eyepieces. Last year I attended a start party and friend showed me the double cluster through my telescope with his super wide angle eyepiece. The view was amazing it was up close and very detailed. I recently bought a Ultra Wide Angle eyepiece which I used for the first time last night. The only difference is that the cluster was visible, but very far away. The eye piece specs are below along with my telescope details. I guess I'm asking for advice as to which eyepiece I should use to get the same results we got at the star party. Maybe the Ultra Wide Angle I'm using has too big of an angle? Standing by for inputs. Thank you.

    My details:


    Sky-Watcher Explorer-200P (EQ5) Parabolic Newtonian Reflector Telescope

    Type Parabolic Newtonian Reflector
    Primary mirror 200mm
    Focal length (tele) 1000
    Max aperture (tele) f/5
    Eyepiece 10mm & 25mm, x2 Deluxe Barlow Lens
    Magnification x40, x80, x100, x200


    Sky-Watcher Sky Panorama 15mm Ultra-Wide Eyepiece
    Type Ultrawide Eyepiece
    Focal Length 15mm
    Apparent Field of View 82 Degree
    Eyepiece Barrels 1.25 Inch/31.7mm Format
    For use with Any 1.25 Inch eyepiece holder

  2. #2
    jerryTheC's Avatar
    jerryTheC is offline Super Moderator
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    There are two different things to consider - the apparent field of view, or how big the circle you see things in is, which is determined by the eyepiece design (82 degrees in your case) and the true field of view - how much of the sky you see - which is determined by the AFOV and the magnification, which depends on the focal length of your scope and the focal length of your eyepiece. If you have skymap/planetarium software like stellarium, you should be able to enter scope and eyepiece details and get it to superimpose a circle on the display to show you how much fits into the eyepiece.

    It's possible that (assuming you're looking at the same object) the magnification is significantly different from the original view - it might be higher, in which case you may be only seeing part of the centre, or lower - which would make the object smaller (in which case, using a Barlow would enlarge it). Or you might be looking at something different and smaller... Checking things out with the software to see how much should fit in may help

  3. #3
    light bucket's Avatar
    light bucket is offline Bright Giants
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    Default Re: Ultra Wide Angle Eyepiece Help

    Hello Jespola , this might help/Users/davidstaples/Desktop/Tele Vue Optics: The Majesty Factor.webarchive



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