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Eyepieces

The specifications of a telescope are NOT the only specs that matter. The other half of the equation is the specifications of the eyepiece. Telescope eyepieces are made in different models and sizes to accommodate different observing methods and celestial objects. For example, understanding the focal length of your optical tube divided by the focal length of your eyepiece will result in magnification, which in return can tell you whether it is more suitable for deep space low surface brightness observation or planetary/terrestrial high surface brightness observation. For example, if you wanted to observe an object such as the Andromeda Galaxy with a large apparent diameter, an eyepiece with a long focal length and large apparent field of view would excel over an eyepiece with a shorter focal length and small apparent field of view because it would be able to accommodate the size of the object at low magnification and high FOV while not getting dimmer images as you would with short focal lengths. If you plan on observing planets, a short focal length eyepiece with a small FOV will result in high magnification to observe details on the surface (eg. Great Red Spot). You'll get a dimmer image, but since planets are already bright as it is, this won't be an issue. - Note: Almost all eyepieces come in 2" or 1.25" barrel size forms.

 


Telescope Focal Length

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  1. Orion 12.5mm Illuminated Reticle Plossl Eyepiece

    Orion - 12.5mm Illuminated Reticle Plossl Eyepiece

    A 4-element Plossl design with fully multi-coated lenses ensures bright views through the illuminated reticle eyepiece. Its 40° apparent field is ideal for multiple functions.

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    Model#: 08450
    Sale lasts until Feb 12, 2015!

    Regular Price: $79.99

    Special Price: $71.49

  2. Orion - Long Eye Relief 3mm Telescope Eyepiece

    Orion - Long Eye Relief 3mm Telescope Eyepiece

    High-power 3mm telescope eyepiece ideal for pristine high-magnification viewsLong 20mm eye relief makes each view comfortable, with or without eyeglasses onNice 55° eyepiece apparent field of view gives you a large window to the cosmosProvid ... Learn More
    Model#: 07842
    $99.95

  3. Orion - Long Eye Relief 5mm Telescope Eyepiece

    Orion - Long Eye Relief 5mm Telescope Eyepiece

    High-power 5mm telescope eyepiece ideal for pristine high-magnification viewsLong 20mm eye relief makes each view comfortable, with or without eyeglasses onNice 55° eyepiece apparent field of view gives you a large window to the cosmosProvid ... Learn More
    Model#: 07843
    $99.95

  4. Orion - Epic II ED 25mm Telescope Eyepiece

    Orion - Epic II ED 25mm Telescope Eyepiece

    With 2 elements of high-quality ED glass, this 25mm telescope eyepiece provides exceptional viewsPerfect for powerful observation of many objects in the night sky such as the Moon, planets, and bright clusters and nebulasWide 60° apparent fie ... Learn More
    Model#: 08256
    $99.95

  5. Orion - Epic II ED 18mm Telescope Eyepiece

    Orion - Epic II ED 18mm Telescope Eyepiece

    This 18mm telescope eyepiece features 2 elements of high-quality ED glass to provide exceptional viewsPerfect for powerful observation of many objects in the night sky such as the Moon, planets, and bright clusters and nebulasWide 60° apparent ... Learn More
    Model#: 08255
    $99.95

  6. Orion - Epic II ED 15mm Telescope Eyepiece

    Orion - Epic II ED 15mm Telescope Eyepiece

    With 2 elements of high-quality ED glass, this 15mm telescope eyepiece provides exceptional viewsPerfect for powerful observation of many objects in the night sky such as the Moon, planets, and bright clusters and nebulasWide 60° ... Learn More
    Model#: 08254
    $99.95

  7. Orion - Long Eye Relief 6mm Telescope Eyepiece

    Orion - Long Eye Relief 6mm Telescope Eyepiece

    High-power 6mm telescope eyepiece ideal for pristine high-magnification viewsLong 20mm eye relief makes each view comfortable, with or without eyeglasses onNice 55° eyepiece apparent field of view gives you a large window to the cosmosProvid ... Learn More
    Model#: 07844
    $99.95

  8. Orion - Long Eye Relief 9mm Telescope Eyepiece

    Orion - Long Eye Relief 9mm Telescope Eyepiece

    High-power 9mm telescope eyepiece ideal for pristine high-magnification viewsLong 20mm eye relief makes each view comfortable, with or without eyeglasses onNice 55° eyepiece apparent field of view gives you a large window to the cosmosProvid ... Learn More
    Model#: 07845
    $99.95

  9. Orion - Long Eye Relief 12.5mm Telescope Eyepiece
  10. Orion - Long Eye Relief 14.5mm Telescope Eyepiece
  11. Orion - Long Eye Relief 18mm Telescope Eyepiece

    Orion - Long Eye Relief 18mm Telescope Eyepiece

    Moderate-power 18mm telescope eyepiece ideal for sharp, clear views of the cosmosVery long 20mm eye relief makes each view comfortable, with or without eyeglassesNice 55° apparent field of view gives you a large window to the cosmosProv ... Learn More
    Model#: 07848
    $99.95

  12. Orion - Epic II ED 5mm Telescope Eyepiece

    Orion - Epic II ED 5mm Telescope Eyepiece

    This 5mm telescope eyepiece features 2 elements of high-quality ED glass to provide exceptional viewsPerfect for high-power observation of many objects in the night sky such as the Moon, planets, and bright clusters and nebulasWide 58° ... Learn More
    Model#: 08251
    $99.95

  13. Orion - Epic II ED 8mm Telescope Eyepiece

    Orion - Epic II ED 8mm Telescope Eyepiece

    With 2 elements of high-quality ED glass, this 8mm telescope eyepiece provides exceptional viewsPerfect for powerful observation of many objects in the night sky such as the Moon, planets, and bright clusters and nebulasWide 58° appar ... Learn More
    Model#: 08252
    $99.95

  14. Orion - Epic II ED 12mm Telescope Eyepiece

    Orion - Epic II ED 12mm Telescope Eyepiece

    This 12mm telescope eyepiece features 2 elements of high-quality ED glass to provide exceptional viewsPerfect for powerful observation of many objects in the night sky such as the Moon, planets, and bright clusters and nebulasWide 60&de

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    Model#: 08253
    $99.95

  15. Orion - Q70 Eyepiece Set - 26mm, 32mm, 38mm

    Orion - Q70 Eyepiece Set - 26mm, 32mm, 38mm

    Buy this set of all three Orion Q70 2" eyepieces - 26mm, 32mm, and 38mm - and save!

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    Model#: 24708
    $249.95

  16. Orion - MegaView Ulta-Wide 4mm Eyepiece

    Orion - MegaView Ulta-Wide 4mm Eyepiece

    * This 1 ... Learn More
    Model#: 08852
    $197.95

  17. Orion - MegaView Ulta-Wide 28mm Eyepiece

    Orion - MegaView Ulta-Wide 28mm Eyepiece

    * This 2" 28mm eyepiece boasts a 27mm ocular lens diameter and 18mm eye relief * Offers a whopping 82-degree apparent field of view for larger shots of land and sky * Optics are fully multi-coated for optimum light transmission and image ... Learn More
    Model#: 08855

    Regular Price: $397.95

    Special Price: $299.99

  18. Orion - Premium 7.5mm-22.5mm Zoom Eyepiece

    Orion - Premium 7.5mm-22.5mm Zoom Eyepiece

    Add a Little Zoom to Your Stargazing. * Elegant zoom eyepiece designed for convenient, comfortable, and crisp views of the night sky * Focal length range of 7.5mm to 22 ... Learn More
    Model#: 08238
    $279.95

  19. Orion - 20mm Illuminated Centering Eyepiece

    Orion - 20mm Illuminated Centering Eyepiece

    You'll never be left in the dark with the Orion 20mm Illuminated Centering Eyepiece (ICE). Whether you're acquiring and centerign stars for GoTo system alignment, lining up guide stars and/or target objects for astro-imaging, or just testing the accuracy of your tracking system, the ICE will quickly become one of your most trusted and useful imaging tools.

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    Model#: 08239
    $99.00

  20. Orion - MegaView Ulta-Wide 16mm Eyepiece

    Orion - MegaView Ulta-Wide 16mm Eyepiece

    * This 1 ... Learn More
    Model#: 08854
    $237.95

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