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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° 14mm 1.25" Waterproof Eyepiece
    Save $40.05 Save $0.00
    $149.99
    $149.99 - $149.99
    $149.99
    $109.94
    $109.94 - $109.94
    $109.94

    Explore Scientific 62° 14mm 1.25" Waterproof Eyepiece

    Explore Scientific
    In Stock

    Explore Scientific Waterproof Eyepieces - Comfort, Quality, Value. Explore Scientific Waterproof Eyepieces - Comfort, Quality, Value. The Explore S...

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    $149.99
    $149.99 - $149.99
    $149.99
    $109.94
    $109.94 - $109.94
    $109.94
    Save $40.05 Save $0.00
  • $29.95 - $29.95
    $29.95
    $29.95 - $29.95
    $29.95

    Celestron Omni 12mm 1.25" Plossl Eyepiece 93319

    Celestron
    In Stock

    This Celestron Omni is a good quality medium power eyepiece at a good low price. It's designed for detailed lunar observing, for getting up close a...

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    $29.95 - $29.95
    $29.95
    $29.95 - $29.95
    $29.95
  • 2.3mm X-Cel LX Series 1.25"
    $99.95 - $99.95
    $99.95
    $99.95 - $99.95
    $99.95

    Celestron 2.3mm X-Cel LX Series 1.25" Eyepiece

    Celestron
    In Stock

    This very short focal length Celestron X-Cel LX 2.3mm eyepiece uses a new six-element fully-multicoated optical system to provide a wide 60° field ...

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    $99.95 - $99.95
    $99.95
    $99.95 - $99.95
    $99.95
  • 19mm 2" 82° Luminos
    $189.95 - $189.95
    $189.95
    $189.95 - $189.95
    $189.95

    Celestron 19mm 2" 82° Luminos Eyepiece

    Celestron
    In Stock

    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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    $189.95 - $189.95
    $189.95
    $189.95 - $189.95
    $189.95
  • 10mm 1.25" 82° Luminos
    $129.95 - $129.95
    $129.95
    $129.95 - $129.95
    $129.95

    Celestron 10mm 1.25" 82° Luminos Eyepiece

    Celestron
    In Stock

    This exceptional Celestron 10mm Luminos ultra wide field 1.25" eyepiece uses seven optical elements for optimized performance across a very wide an...

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    $129.95 - $129.95
    $129.95
    $129.95 - $129.95
    $129.95
  • 5.5mm 100° field argon-purged waterproof 2" eyepiece
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    $549.99
    $549.99 - $549.99
    $549.99
    $449.94
    $449.94 - $449.94
    $449.94

    Explore Scientific 5.5mm 100° Field Waterproof 2" Eyepiece

    Explore Scientific
    In Stock

    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
    $449.94
    $449.94 - $449.94
    $449.94
    Save $100.05 Save $0.00
  • Questar 32mm Brandon
    $300.00 - $300.00
    $300.00
    $300.00 - $300.00
    $300.00

    Questar 32mm Brandon Eyepiece

    Questar
    More on the way

    This is an excellent low power eyepiece for capturing galaxy pairs and compact galaxy clusters, viewing emission and reflection nebulas and smaller...

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    $300.00 - $300.00
    $300.00
    $300.00 - $300.00
    $300.00
  • 31mm 2" 82° Luminos
    $279.95 - $279.95
    $279.95
    $279.95 - $279.95
    $279.95

    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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    $279.95 - $279.95
    $279.95
    $279.95 - $279.95
    $279.95
  • 1.00 Diopter Dioptrx astigmatism-correcting lens
    $119.00 - $119.00
    $119.00
    $119.00 - $119.00
    $119.00

    TeleVue 1.00 Diopter Dioptrx Astigmatism-Correcting Lens

    TeleVue
    In Stock

    This Dioptrx accessory lens corrects for an astigmatism of 1.00 diopter. (This would be a"CYL" value of 1.00 in your eyeglass prescription.)  The l...

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    $119.00 - $119.00
    $119.00
    $119.00 - $119.00
    $119.00
  • 2.25 Diopter Dioptrx astigmatism-correcting lens
    $119.00 - $119.00
    $119.00
    $119.00 - $119.00
    $119.00

    TeleVue 2.25 Diopter Dioptrx Astigmatism-Correcting Lens

    TeleVue
    More on the way

    This Dioptrx accessory lens corrects for an astigmatism of 2.25 diopters. (This would be a "CYL" value of 2.25 in your eyeglass prescription.)  The...

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    $119.00 - $119.00
    $119.00
    $119.00 - $119.00
    $119.00
  • Save $100.05 Save $0.00
    $799.99
    $799.99 - $799.99
    $799.99
    $699.94
    $699.94 - $699.94
    $699.94

    Explore Scientific 20mm 100° field waterproof 2" eyepiece

    Explore Scientific
    In Stock

    The 100° apparent field of the Explore Scientific 20mm waterproof 2" eyepiece provides superb maximum field/medium power observing in all scopes, f...

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    $799.99
    $799.99 - $799.99
    $799.99
    $699.94
    $699.94 - $699.94
    $699.94
    Save $100.05 Save $0.00
  • Save $40.05 Save $0.00
    $129.99
    $129.99 - $129.99
    $129.99
    $89.94
    $89.94 - $89.94
    $89.94

    Explore Scientific 25mm 52° Series Waterproof Eyepiece

    Explore Scientific
    In Stock

    Looking for something out of the ordinary for your next eyepiece?  The Explore Scientific 52° series is a strong contender for necessary addition t...

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    $129.99
    $129.99 - $129.99
    $129.99
    $89.94
    $89.94 - $89.94
    $89.94
    Save $40.05 Save $0.00
  • Save $40.05 Save $0.00
    $119.99
    $119.99 - $119.99
    $119.99
    $79.94
    $79.94 - $79.94
    $79.94

    Explore Scientific 20mm 52° Series Waterproof Eyepiece

    Explore Scientific
    In Stock

    Looking for something out of the ordinary for your next eyepiece?  The Explore Scientific 52° series is a strong contender for necessary addition t...

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    $119.99
    $119.99 - $119.99
    $119.99
    $79.94
    $79.94 - $79.94
    $79.94
    Save $40.05 Save $0.00
  • 30mm 100° field argon-purged waterproof 3" eyepiece
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    $1,099.99
    $1,099.99 - $1,099.99
    $1,099.99
    $999.94
    $999.94 - $999.94
    $999.94

    Explore Scientific 30mm 100° Field Argon-Purged Waterproof 3" Eyepiece

    Explore Scientific
    In Stock

    The 100° apparent field of the Explore Scientific 30mm waterproof 3" eyepiece provides superb maximum field/medium to medium-low power observing in...

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    $1,099.99
    $1,099.99 - $1,099.99
    $1,099.99
    $999.94
    $999.94 - $999.94
    $999.94
    Save $100.05 Save $0.00
  • $29.95 - $29.95
    $29.95
    $29.95 - $29.95
    $29.95

    Celestron Omni 9mm 1.25" Plossl Eyepiece 93318

    Celestron
    In Stock

    This fully-multicoated Plössl is a good quality medium high to high power eyepiece at a sensibly low price. It's designed for high magnification lu...

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    $29.95 - $29.95
    $29.95
    $29.95 - $29.95
    $29.95
  • 1.50 Diopter Dioptrx astigmatism-correcting lens
    $119.00 - $119.00
    $119.00
    $119.00 - $119.00
    $119.00

    TeleVue 1.50 Diopter Dioptrx Astigmatism-Correcting Lens

    TeleVue
    In Stock

    This Dioptrx accessory lens corrects for an astigmatism of 1.50 diopters. (This would be a"CYL" value of 1.50 in your eyeglass prescription.)  The ...

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    $119.00 - $119.00
    $119.00
    $119.00 - $119.00
    $119.00
  • 0.50 Diopter Dioptrx astigmatism-correcting lens
    $109.00 - $109.00
    $109.00
    $109.00 - $109.00
    $109.00

    TeleVue 0.50 Diopter Dioptrx Astigmatism-Correcting Lens

    TeleVue
    In Stock

    This Dioptrx accessory lens corrects for an astigmatism of 0.50 diopter. (This would be a"CYL" value of 0.50 in your eyeglass prescription.)  The l...

    View full details
    $109.00 - $109.00
    $109.00
    $109.00 - $109.00
    $109.00
  • 2.00 Diopter Dioptrx astigmatism-correcting lens
    $119.00 - $119.00
    $119.00
    $119.00 - $119.00
    $119.00

    TeleVue 2.00 Diopter Dioptrx Astigmatism-Correcting Lens

    TeleVue
    In Stock

    This Dioptrx accessory lens corrects for an astigmatism of 2.00 diopters. (This would be a "CYL" value of 2.00 in your eyeglass prescription.) The ...

    View full details
    $119.00 - $119.00
    $119.00
    $119.00 - $119.00
    $119.00
  • Questar 8mm Brandon
    $300.00 - $300.00
    $300.00
    $300.00 - $300.00
    $300.00

    Questar 8mm Brandon Eyepiece

    Questar
    More on the way

    This is an excellent high power eyepiece for observing lunar and planetary detail, resolving globular clusters, picking up small planetary nebulas ...

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    $300.00 - $300.00
    $300.00
    $300.00 - $300.00
    $300.00
  • 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
    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 $100.05 Save $0.00
    $679.99
    $679.99 - $679.99
    $679.99
    $579.94
    $579.94 - $579.94
    $579.94

    Explore Scientific 14mm 100° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
    In Stock

    The 100° apparent field of the Explore Scientific 14mm argon-purged waterproof 2" eyepiece provides incredible maximum field/medium power observing...

    View full details
    $679.99
    $679.99 - $679.99
    $679.99
    $579.94
    $579.94 - $579.94
    $579.94
    Save $100.05 Save $0.00
  • 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
    More on the way

    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
  • 1.75 Diopter Dioptrx astigmatism-correcting lens
    $109.00 - $109.00
    $109.00
    $109.00 - $109.00
    $109.00

    TeleVue 1.75 Diopter Dioptrx Astigmatism-Correcting Lens

    TeleVue
    More on the way

    This accessory lens corrects for 1.75 diopters of astigmatism when used with the appropriate TeleVue eyepiece . . .This Dioptrx accessory lens corr...

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    $109.00 - $109.00
    $109.00
    $109.00 - $109.00
    $109.00

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