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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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  • 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
    More on the way

    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
  • 12mm Brandon "flat top"
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 12mm Brandon "Flat Top" Eyepiece

    Vernonscope
    More on the way

    The 12mm Vernonscope Brandon "flat top" eyepiece is designed for high power use with any telescope type, at focal ratios f/7 and above. It provides...

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    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 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
    Save $100.95 Save $0.00
  • Celestron Ultima Edge 24mm 1.25-inch eyepiece with 70-degree apparent field of view
    $259.95 - $259.95
    $259.95
    $259.95 - $259.95
    $259.95

    Celestron Ultima Edge 24mm 1.25" Eyepiece 93453

    Celestron
    In Stock

    Celestron Ultima Edge 24mm 1.25" Eyepiece – Flat Field Precision with Comfortable Eye Relief If you’re searching for a premium wide-angle eyepiece ...

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    $259.95 - $259.95
    $259.95
    $259.95 - $259.95
    $259.95
  • 32mm Brandon "flat top"
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 32mm Brandon "Flat Top" Eyepiece

    Vernonscope
    More on the way

    The 32mm Vernonscope Brandon "flat top" eyepiece is designed for nigh-perfect low power deep sky observing with any telescope type, at focal ratios...

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    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 24mm Brandon "flat top"
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 24mm Brandon "Flat Top" Eyepiece

    Vernonscope
    More on the way

    The 24mm Vernonscope Brandon "flat top" eyepiece is designed for nigh-perfect medium power deep sky observing with any telescope type, at focal rat...

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    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 8mm Brandon "flat top"
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 8mm Brandon Flat Top Eyepiece

    Vernonscope
    More on the way

    The 8mm Vernonscope Brandon "flat top" eyepiece is designed for high power use with any telescope type, at focal ratios f/7 and above. It provides ...

    View full details
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 2" 48mm Brandon
    $375.00 - $375.00
    $375.00
    $375.00 - $375.00
    $375.00

    Vernonscope 2" 48mm Brandon Eyepiece

    Vernonscope
    More on the way

    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
  • 16mm Brandon
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 16mm Brandon Eyepiece

    Vernonscope
    More on the way

    The 16mm Vernonscope Brandon eyepiece is designed for medium power high contrast/dark sky background use with any telescope type, at focal ratios f...

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    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 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
    More on the way

    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
  • Celestron Ultima Edge 10mm 1.25-inch eyepiece with 70-degree apparent field of view
    $109.95 - $109.95
    $109.95
    $109.95 - $109.95
    $109.95

    Celestron Ultima Edge 10mm 1.25" Eyepiece 93450

    Celestron
    In Stock

    Celestron Ultima Edge 10mm 1.25" EyepieceFlat-field performance and high-power precision in a compact, premium design If you're looking for a high-...

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    $109.95 - $109.95
    $109.95
    $109.95 - $109.95
    $109.95
  • 6mm Brandon "flat top"
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 6mm Brandon "Flat Top" Eyepiece

    Vernonscope
    More on the way

    The 6mm Vernonscope Brandon "flat top" eyepiece is designed for very high power use with any telescope type, at focal ratios f/7 and above. It prov...

    View full details
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 16mm Brandon "flat top"
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 16mm Brandon "Flat Top" Eyepiece

    Vernonscope
    More on the way

    The 16mm Vernonscope Brandon "flat top" eyepiece is designed for medium power high contrast/dark sky background use with any telescope type, at foc...

    View full details
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 8mm Brandon
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 8mm Brandon Eyepiece

    Vernonscope
    More on the way

    The 8mm Vernonscope Brandon eyepiece is designed for high power use with any telescope type, at focal ratios f/7 and above. It provides highly deta...

    View full details
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 32mm Brandon
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 32mm Brandon Eyepiece

    Vernonscope
    More on the way

    The 32mm Vernonscope Brandon eyepiece is designed for nigh-perfect low power deep sky observing with any telescope type, at focal ratios f/7 and ab...

    View full details
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 24mm Brandon
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 24mm Brandon Eyepiece

    Vernonscope
    More on the way

    The 24mm Vernonscope Brandon eyepiece is designed for nigh-perfect medium power deep sky observing with any telescope type, at focal ratios f/7 and...

    View full details
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 12mm Brandon
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 12mm Brandon Eyepiece

    Vernonscope
    More on the way

    The 12mm Vernonscope Brandon eyepiece is designed for high power use with any telescope type, at focal ratios f/7 and above. It provides highly det...

    View full details
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 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
  • 3.50 Diopter Dioptrx astigmatism-correcting lens
    $138.00 - $138.00
    $138.00
    $138.00 - $138.00
    $138.00

    TeleVue 3.50 Diopter Dioptrx Astigmatism-Correcting Lens

    TeleVue
    In Stock

    This Dioptrx accessory lens corrects for an astigmatism of 3.50 diopters. (This would be a "CYL" value of 3.50 in your eyeglass prescription.)  The...

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    $138.00 - $138.00
    $138.00
    $138.00 - $138.00
    $138.00
  • 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...

    View full details
    $299.95 - $299.95
    $299.95
    $299.95 - $299.95
    $299.95
  • Celestron Ultima Edge 18mm 1.25-inch eyepiece with 70-degree apparent field of view
    $169.95 - $169.95
    $169.95
    $169.95 - $169.95
    $169.95

    Celestron Ultima Edge 18mm 1.25" Eyepiece 93452

    Celestron
    In Stock

    Celestron Ultima Edge 18mm 1.25" Eyepiece If you're looking for an eyepiece that delivers flat-field performance without breaking the bank, the Cel...

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    $169.95 - $169.95
    $169.95
    $169.95 - $169.95
    $169.95
  • Celestron Observer’s Accessory Kit open case with eyepieces and filters
    $159.95 - $159.95
    $159.95
    $159.95 - $159.95
    $159.95

    Celestron 1.25" Observers Accessory Kit

    Celestron
    In Stock

    Celestron 1.25" Observer’s Accessory Kit (#94308) If you’re just starting out with a telescope or looking to upgrade your basic accessories, the Ce...

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    $159.95 - $159.95
    $159.95
    $159.95 - $159.95
    $159.95
  • 8-24mm SMC 1.25" long eye relief astronomical zoom; 21-63x or 26-78x spotting scope zoom
    $359.00 - $359.00
    $359.00
    $359.00 - $359.00
    $359.00

    Pentax 8-24mm SMC 1.25" Long Eye Relief Astronomical Zoom; 21-63x or 26-78x Spotting Scope Zoom

    Pentax
    More on the way

    This is an ultra-premium six-element zoom eyepiece. It has a long eye relief that's particularly well-suited to those who must wear eyeglasses whil...

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    $359.00 - $359.00
    $359.00
    $359.00 - $359.00
    $359.00

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