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Eyepieces & Barlows

What is an eyepiece: A telescope collects the light of faint and/or distant objects and forms a fixed-size image of those objects at the telescope’s prime focus. An eyepiece is simply a small microscope that enlarges a portion of that image so you can see more detail.

The importance of good eyepieces: Every photon of light collected by a telescope passes through an eyepiece before it reaches your eye. That light is therefore afflicted by every optical problem in that eyepiece – and the cheaper the eyepiece, the more problems it is likely to have. A $10 eyepiece will make a $2000 telescope perform like a $10 toy. If your telescope’s eyepieces are the simple two-element designs labeled H (Huygenian), R (Ramsden), or SR (symmetrical Ramsden), they are basically toy eyepieces and should be replaced.

Eyepieces are half of your scope’s optical system, and usually the most complex half. They should be at least the same quality as your scope (preferably better). A good telescope won’t improve a poor eyepiece – but a good eyepiece will get the most out of a so-so scope.

What eyepiece should I get first: When buying your first eyepieces, resist the urge to immediately buy the highest powers possible. Very high powers require experienced observers and excellent seeing conditions (dark, clear, steady skies) to get the most from them. Medium power eyepieces, on the other hand, give good images over a much wider range of seeing conditions.

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  • 20mm 68° field argon-purged waterproof 1.25" eyepiece
    $219.99 - $219.99
    $219.99
    $219.99 - $219.99
    $219.99

    Explore Scientific 20mm 68° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
    In Stock

    This Explore Scientific 20mm argon-purged waterproof eyepiece is a fine medium power 1.25" eyepiece whose substantial 68° field of view gives you "...

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    $219.99 - $219.99
    $219.99
    $219.99 - $219.99
    $219.99
  • CrossAim 12.5mm dual crosshair Plössl
    $104.95 - $104.95
    $104.95
    $104.95 - $104.95
    $104.95

    Celestron Crossaim 12.5mm Dual Crosshair Plössl Eyepiece 93235

    Celestron
    More on the way

    This Celestron "CrossAim" 12.5mm illuminated reticle eyepiece has dual crosshairs for use with any make or model telescope and/or off-axis guider. ...

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    $104.95 - $104.95
    $104.95
    $104.95 - $104.95
    $104.95
  • $428.00 - $428.00
    $428.00
    $428.00 - $428.00
    $428.00

    TeleVue 35mm 2" Panoptic Eyepiece

    TeleVue
    More on the way

    An excellent and physically-impressive premium-quality low power wide field 2" eyepiece for the serious deep space explorer. The Tele Vue 35mm Pano...

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    $428.00 - $428.00
    $428.00
    $428.00 - $428.00
    $428.00
  • 5mm XW extra wide angle eyepiece
    $299.00 - $299.00
    $299.00
    $299.00 - $299.00
    $299.00

    Pentax 5mm XW Extra Wide Angle Eyepiece

    Pentax
    More on the way

    This short focal length Pentax eyepiece has a very wide 70° field of view and very long 20mm eye relief, a uniquely useful combination not matched ...

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    $299.00 - $299.00
    $299.00
    $299.00 - $299.00
    $299.00
  • $299.00 - $299.00
    $299.00
    $299.00 - $299.00
    $299.00

    Pentax 3.5mm XW Extra Wide Angle Eyepiece

    Pentax
    In Stock

    This very short focal length Pentax eyepiece has a wide 70° field of view combined with a long 20mm eye relief for eyeglass use. It's a combination...

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    $299.00 - $299.00
    $299.00
    $299.00 - $299.00
    $299.00
  • $269.00 - $269.00
    $269.00
    $269.00 - $269.00
    $269.00

    TeleVue 15mm Delite 62º 1.25” Eyepiece

    TeleVue
    More on the way

    The 15mm TeleVue DeLite eyepiece is a lighter, more compact, less expensive, 62° field/20mm eye relief version of the famed TeleVue Delos eyepieces...

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    $269.00 - $269.00
    $269.00
    $269.00 - $269.00
    $269.00
  • $119.95 - $119.95
    $119.95
    $119.95 - $119.95
    $119.95

    Celestron X-Cel LX 3X 3-Element Barlow For 1.25" Eyepieces 93428

    Celestron
    More on the way

    This three-power Celestron X-Cel LX 1.25" Barlow is an air-spaced three-lens fully multicoated Barlow that provides premium optical performance at ...

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    $119.95 - $119.95
    $119.95
    $119.95 - $119.95
    $119.95
  • $101.00 - $101.00
    $101.00
    $101.00 - $101.00
    $101.00

    TeleVue 15mm Plössl Eyepiece

    TeleVue
    In Stock

    This is a very good medium power eyepiece for lunar observing, resolving globular clusters, picking up detail in the more compact emission and refl...

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    $101.00 - $101.00
    $101.00
    $101.00 - $101.00
    $101.00
  • $575.01 - $575.01
    $575.01
    $575.01 - $575.01
    $575.01

    TeleVue 41mm 2" Panoptic Eyepiece

    TeleVue
    More on the way

    This is a premium-quality wide field 2" eyepiece for the serious deep space explorer. Because of its long focal length, it is at its best with tele...

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    $575.01 - $575.01
    $575.01
    $575.01 - $575.01
    $575.01
  • $229.00 - $229.00
    $229.00
    $229.00 - $229.00
    $229.00

    TeleVue 5X Powermate Image Amplifier for 1.25" Eyepieces

    TeleVue
    More on the way

    If you must wear glasses while observing, and you're looking for an ultra high power Barlow to get high magnifications from your favorite long foca...

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    $229.00 - $229.00
    $229.00
    $229.00 - $229.00
    $229.00
  • 12mm X-Cel LX Series 1.25"
    $99.95 - $99.95
    $99.95
    $99.95 - $99.95
    $99.95

    Celestron 12mm X-Cel LX Series 1.25" Eyepiece

    Celestron
    In Stock

    This medium focal length 12mm Celestron X-Cel LX Series six-element eyepiece is usable for high quality medium to medium high magnification observi...

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    $99.95 - $99.95
    $99.95
    $99.95 - $99.95
    $99.95
  • 2X Barlow for 1.25" eyepieces
    $199.99 - $199.99
    $199.99
    $199.99 - $199.99
    $199.99

    Explore Scientific 2X Barlow for 1.25" eyepieces

    Explore Scientific
    In Stock

    This four-element 1.25" 2x Explore Scientific focal extender (Barlow lens) has an exceptionally flat field and essentially no color fringing with a...

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    $199.99 - $199.99
    $199.99
    $199.99 - $199.99
    $199.99
  • $269.00 - $269.00
    $269.00
    $269.00 - $269.00
    $269.00

    Televue 13mm Delite 62º 1.25” Eyepiece EDE-13.0

    TeleVue
    More on the way

    The TeleVue 13mm DeLite eyepiece is a lighter, more compact, less expensive, 62° field/20mm eye relief version of the famed TeleVue Delos eyepieces...

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    $269.00 - $269.00
    $269.00
    $269.00 - $269.00
    $269.00
  • $387.00 - $387.00
    $387.00
    $387.00 - $387.00
    $387.00

    TeleVue 17.3mm 1.25" 72° Field Delos Eyepiece

    TeleVue
    In Stock

    The 17.3mm TeleVue Delos is a "do-it-all" eyepiece designed for medium power/high contrast solar system and deep space observing with all telescope...

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    $387.00 - $387.00
    $387.00
    $387.00 - $387.00
    $387.00
  • 12mm 1.25" 72° field Delos
    $387.00 - $387.00
    $387.00
    $387.00 - $387.00
    $387.00

    TeleVue 12mm 1.25" 72° Field Delos Eyepiece

    TeleVue
    In Stock

    The 12mm TeleVue Delos puts the performance of the acclaimed TeleVue 13mm Ethos eyepiece - high contrast, a neutral color balance, and full field s...

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    $387.00 - $387.00
    $387.00
    $387.00 - $387.00
    $387.00
  • $256.00 - $256.00
    $256.00
    $256.00 - $256.00
    $256.00

    TeleVue 55mm Plössl Eyepiece

    TeleVue
    More on the way

    If you have a 2" focuser on your f/8 and longer focal ratio telescope, here's a 2" eyepiece that will give you the widest possible field of view - ...

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    $256.00 - $256.00
    $256.00
    $256.00 - $256.00
    $256.00
  • $299.00 - $299.00
    $299.00
    $299.00 - $299.00
    $299.00

    Pentax 20mm XW Extra Wide Angle Eyepiece

    Pentax
    In Stock

    This medium focal length Pentax provides sharp and very wide field images for both terrestrial and astronomical observing. Terrestrially, it is an ...

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    $299.00 - $299.00
    $299.00
    $299.00 - $299.00
    $299.00
  • $269.00 - $269.00
    $269.00
    $269.00 - $269.00
    $269.00

    Televue 3mm Delite 62º 1.25” Eyepiece EDE-03.0

    TeleVue
    In Stock

    The TeleVue 3mm DeLite eyepiece is a lighter, more compact, less expensive, 62° field/20mm eye relief version of the famed TeleVue Delos eyepieces,...

    View full details
    $269.00 - $269.00
    $269.00
    $269.00 - $269.00
    $269.00
  • $657.01 - $657.01
    $657.01
    $657.01 - $657.01
    $657.01

    TeleVue 4.7mm 1.25"/2" 110° Field Ethos-SX Eyepiece

    TeleVue
    More on the way

    Nearly half a century ago, Al Nagler designed the optics for the LEM (Lunar Excursion Module) simulator that was used to train NASA astronauts how ...

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    $657.01 - $657.01
    $657.01
    $657.01 - $657.01
    $657.01
  • $122.00 - $122.00
    $122.00
    $122.00 - $122.00
    $122.00

    TeleVue 20mm Plössl Eyepiece

    TeleVue
    In Stock

    This is a very good medium power eyepiece for lunar observing, resolving globular clusters, picking up detail in emission and reflection nebulas, e...

    View full details
    $122.00 - $122.00
    $122.00
    $122.00 - $122.00
    $122.00
  • 8mm 1.25" 72° field Delos
    $387.00 - $387.00
    $387.00
    $387.00 - $387.00
    $387.00

    TeleVue 8mm 1.25" 72° Field Delos Eyepiece

    TeleVue
    In Stock

    The 8mm TeleVue Delos puts the performance of the original ground-breaking TeleVue 9mm Ethos eyepiece - high contrast, a neutral color balance, and...

    View full details
    $387.00 - $387.00
    $387.00
    $387.00 - $387.00
    $387.00
  • $439.99 - $439.99
    $439.99
    $439.99 - $439.99
    $439.99

    Explore Scientific 24mm 82° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
    More on the way

    This 82° field Explore Scientific 24mm 2" argon-purged waterproof eyepiece makes observing feel like you're relaxing in front of a picture window o...

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    $439.99 - $439.99
    $439.99
    $439.99 - $439.99
    $439.99
  • 28mm 68° field argon-purged waterproof 2" eyepiece
    $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $299.99

    Explore Scientific 28mm 68° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
    In Stock

    This Explore Scientific 28mm argon-purged is a substantial 2" eyepiece that gives impressively sharp and contrasty wide field views of nebulas, com...

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    $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $299.99
  • $658.00 - $658.00
    $658.00
    $658.00 - $658.00
    $658.00

    TeleVue 10mm 1.25"/2" 100° Field Ethos Eyepiece

    TeleVue
    In Stock

    The 10mm TeleVue Ethos is a "do-it-all" eyepiece that is perfect for all telescopes that can utilize this focal length. And, as it fills the hole b...

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    $658.00 - $658.00
    $658.00
    $658.00 - $658.00
    $658.00

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