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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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  • Explore Scientific 62° 40mm 2" Waterproof Eyepiece
    Save $90.00 Save $0.00
    $289.99
    $289.99 - $289.99
    $289.99
    $199.99
    $199.99 - $199.99
    $199.99

    Explore Scientific 40mm 62° 2" Waterproof Eyepiece

    Explore Scientific
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    Explore Scientific 40mm 62° 2" Waterproof Eyepiece The Explore Scientific 40mm 62° Series 2" Eyepiece is a superb choice for deep-sky observers and...

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    $289.99
    $289.99 - $289.99
    $289.99
    $199.99
    $199.99 - $199.99
    $199.99
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  • 5.5mm 100° field argon-purged waterproof 2" eyepiece
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    $549.99
    $549.99 - $549.99
    $549.99
    $199.99
    $199.99 - $199.99
    $199.99

    Explore Scientific 5.5mm 100° Field Waterproof 2" Eyepiece

    Explore Scientific
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    The Explore Scientific 5.5mm argon-purged waterproof 2" eyepiece combines a high power capability with a 100° apparent field to provide a jaw-dropp...

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    $549.99
    $549.99 - $549.99
    $549.99
    $199.99
    $199.99 - $199.99
    $199.99
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  • 40mm 68° field argon-purged waterproof 2" eyepiece
    Save $120.00 Save $0.00
    $519.99
    $519.99 - $519.99
    $519.99
    $399.99
    $399.99 - $399.99
    $399.99

    Explore Scientific 40mm 68° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
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    If you have room in your observing kit for only one long focal length wide angle eyepiece, this Explore Scientific 40mm argon-purged eyepiece may w...

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    $519.99
    $519.99 - $519.99
    $519.99
    $399.99
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    $399.99
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  • 34mm 68° field argon-purged waterproof 2" eyepiece
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    $419.99
    $419.99 - $419.99
    $419.99
    $149.99
    $149.99 - $149.99
    $149.99

    Explore Scientific 34mm 68° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
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    This Explore Scientific 34mm argon-purged 2" is a big eyepiece - big in size, big in weight, big in field of view, big in performance. It gives you...

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    $419.99
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    $419.99
    $149.99
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    $149.99
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  • $241.00 - $241.00
    $241.00
    $241.00 - $241.00
    $241.00

    TeleVue 2X Big Barlow for 2" Eyepieces, with 1.25" Eyepiece Adapter

    TeleVue
    In Stock

    This 2" 2x Clamp Ring Big Barlow can be used with any telescope using a 2" focuser. As it is only 4.5" long, it can also be used in most 2" star di...

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    $241.00 - $241.00
    $241.00
    $241.00 - $241.00
    $241.00
  • 17mm 92° field argon-purged waterproof 2" eyepiece
    $799.99 - $799.99
    $799.99
    $799.99 - $799.99
    $799.99

    Explore Scientific 17mm 92° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
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    You may be startled at the amazingly wide expanse of inky black sky that greets you when you first look into the 92° field of this Explore Scientif...

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    $799.99
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    $799.99
  • Explore Scientific 62° 32mm 2" Waterproof Eyepiece
    Save $80.00 Save $0.00
    $229.99
    $229.99 - $229.99
    $229.99
    $149.99
    $149.99 - $149.99
    $149.99

    Explore Scientific 32mm 62° 2" Waterproof Eyepiece

    Explore Scientific
    In Stock

    Explore Scientific 32mm 62° 2" Waterproof Eyepiece If you're aiming to take full advantage of your telescope's 2" focuser for wide-field, low-power...

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    $229.99
    $229.99 - $229.99
    $229.99
    $149.99
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    $149.99
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  • 19mm 2" 82° Luminos
    $199.95 - $199.95
    $199.95
    $199.95 - $199.95
    $199.95

    Celestron 19mm 2" 82° Luminos Eyepiece

    Celestron
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    This exceptional Celestron 19mm Luminos ultra wide field 2" eyepiece uses six optical elements for optimized performance across a very wide and fla...

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    $199.95 - $199.95
    $199.95
    $199.95 - $199.95
    $199.95
  • 31mm 2" 82° Luminos
    $299.95 - $299.95
    $299.95
    $299.95 - $299.95
    $299.95

    Celestron 31mm 2" 82° Luminos Eyepiece

    Celestron
    In Stock

    This 2" Celestron 31mm Luminos is an excellent low power eyepiece with an exceptionally wide field of view, one so wide you have to move your head ...

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    $299.95 - $299.95
    $299.95
    $299.95 - $299.95
    $299.95
  • Save $50.00 Save $0.00
    $429.00
    $429.00 - $429.00
    $429.00
    $379.00
    $379.00 - $379.00
    $379.00

    Pentax 40mm XW Extra Wide Angle 2" Eyepiece

    Pentax
    More on the way

    This long focal length 2" Pentax eyepiece is outstanding for low power/wide field astronomical observing with long focal length refractors and cata...

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    $429.00
    $429.00 - $429.00
    $429.00
    $379.00
    $379.00 - $379.00
    $379.00
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  • Save $50.00 Save $0.00
    $399.00
    $399.00 - $399.00
    $399.00
    $349.00
    $349.00 - $349.00
    $349.00

    Pentax 30mm XW Extra Wide Angle 2" Eyepiece

    Pentax
    In Stock

    This medium focal length 2" Pentax eyepiece is an excellent choice for medium power deep space observing with long focal length refractors, reflect...

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    $399.00
    $399.00 - $399.00
    $399.00
    $349.00
    $349.00 - $349.00
    $349.00
    Save $50.00 Save $0.00
  • 9mm 120° field argon-purged waterproof 2" eyepiece
    $1,299.99 - $1,299.99
    $1,299.99
    $1,299.99 - $1,299.99
    $1,299.99

    Explore Scientific 9mm 120° field argon-purged waterproof 2" eyepiece

    Explore Scientific
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    A first from Explore Scientific, this 2" 9mm deep sky eyepiece has an immense 120° field that seems to make your telescope disappear and plunge you...

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    $1,299.99 - $1,299.99
    $1,299.99
    $1,299.99 - $1,299.99
    $1,299.99
  • Save $100.95 Save $0.00
    $479.95
    $479.95 - $479.95
    $479.95
    $379.00
    $379.00 - $379.00
    $379.00

    Pentax 16.5mm XW Extra Wide Angle Eyepiece

    Pentax
    In Stock

    This medium focal length Pentax is a dual-purpose eyepiece for both terrestrial and astronomical observing. Terrestrially, it is an excellent moder...

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    $479.95
    $479.95 - $479.95
    $479.95
    $379.00
    $379.00 - $379.00
    $379.00
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  • 2" 48mm Brandon
    $375.00 - $375.00
    $375.00
    $375.00 - $375.00
    $375.00

    Vernonscope 2" 48mm Brandon Eyepiece

    Vernonscope
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    The 2" 48mm Vernonscope Brandon eyepiece is designed for nigh-perfect low power deep sky observing with any telescope type that can use 2" eyepiece...

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    $375.00 - $375.00
    $375.00
    $375.00 - $375.00
    $375.00
  • Tele Vue Delos 24 mm Eyepiece
    $512.00 - $512.00
    $512.00
    $512.00 - $512.00
    $512.00

    Tele Vue Delos 24 mm 2" Eyepiece

    TeleVue
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    Tele Vue Delos 24 mm Eyepiece The Delos 24 mm is more than a window into the sky — it’s an invitation. Born from Tele Vue’s legendary optical craft...

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    $512.00 - $512.00
    $512.00
    $512.00 - $512.00
    $512.00
  • Sky Rover UF 30 mm Ultra Flat Field Eyepiece – 70° apparent field, flat-field optics, 2-inch barrel with accessory thread
    Sky Rover UF 30 mm Ultra Flat Field Eyepiece – 70° apparent field, flat-field optics, 2-inch barrel with accessory thread
    $219.00 - $219.00
    $219.00
    $219.00 - $219.00
    $219.00

    Sky Rover UF 30 mm Ultra Flat Field Eyepiece – 70° Wide Field, 2-inch Barrel

    Sky Rover
    In Stock

    Sky Rover UF 30 mm Ultra Flat Field Eyepiece Designed for Immersive Wide-Field Viewing The UF 30 mm Ultra Flat Field Eyepiece from Sky Rover is the...

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    $219.00 - $219.00
    $219.00
    $219.00 - $219.00
    $219.00
  • Save $100.95 Save $0.00
    $499.95
    $499.95 - $499.95
    $499.95
    $399.00
    $399.00 - $399.00
    $399.00

    Pentax 23mm 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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    $499.95
    $499.95 - $499.95
    $499.95
    $399.00
    $399.00 - $399.00
    $399.00
    Save $100.95 Save $0.00
  • Celestron Ultima Edge 30mm 2-inch eyepiece with 70-degree apparent field of view
    $299.95 - $299.95
    $299.95
    $299.95 - $299.95
    $299.95

    Celestron Ultima Edge 30mm 2" Eyepiece 93454

    Celestron
    In Stock

    Celestron Ultima Edge 30mm 2" Eyepiece – Flat Field, Wide View, Premium Optics If you're looking for a wide-field eyepiece that delivers pinpoint s...

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    $299.95 - $299.95
    $299.95
    $299.95 - $299.95
    $299.95
  • 23mm 2" 82° Luminos
    $249.95 - $249.95
    $249.95
    $249.95 - $249.95
    $249.95

    Celestron 23mm 2" 82° Luminos Eyepiece

    Celestron
    In Stock

    This 2" Celestron Luminos 23mm eyepiece is a six-lens design with a very wide 82° field and minimal field curvature. This makes it particularly wel...

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    $249.95 - $249.95
    $249.95
    $249.95 - $249.95
    $249.95
  • Celestron Omni 56mm 2-inch Plössl eyepiece with long eye relief and wide barrel
    $129.95 - $129.95
    $129.95
    $129.95 - $129.95
    $129.95

    Celestron Omni 56mm 2" Plossl 93328

    Celestron
    More on the way

    Celestron Omni 56mm 2" Plössl Eyepiece – A Wide-Field Low Power Giant for Deep Sky Exploration The Celestron Omni 56mm 2" Plössl eyepiece is design...

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    $129.95 - $129.95
    $129.95
    $129.95 - $129.95
    $129.95

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