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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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  • $31.95 - $31.95
    $31.95
    $31.95 - $31.95
    $31.95

    Celestron Omni 4mm 1.25" Plossl Eyepiece 93316

    Celestron
    More on the way

    This fully-multicoated eyepiece is one of the shortest focal length and most economically-priced Plössl eyepieces available. It's designed for very...

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    $31.95 - $31.95
    $31.95
    $31.95 - $31.95
    $31.95
  • $139.95 - $139.95
    $139.95
    $139.95 - $139.95
    $139.95

    Celestron 7mm 1.25" 82º Luminos Eyepiece

    Celestron
    More on the way

    This sharp 7mm Celestron Luminos eyepiece has a wide and flat 82° field of view for "picture window" views, even at very high powers . This excepti...

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    $139.95 - $139.95
    $139.95
    $139.95 - $139.95
    $139.95
  • Explore Scientific 2-inch 3x focal extender with 1.25-inch adapter for telescope eyepieces
    Explore Scientific 2-inch 3x focal extender Barlow lens in black anodized aluminum housing
    $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $299.99

    Explore Scientific 2" 3x Focal Extender (Barlow)

    Explore Scientific
    In Stock

    The 2" 3x Explore Scientific premium Barlow (described by Explore Scientific as a focal extender, rather than a Barlow) uses an advanced four-eleme...

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    $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $299.99
  • $279.95 - $279.95
    $279.95
    $279.95 - $279.95
    $279.95

    Astro-Tech 3.5mm 110° Field Waterproof 1.25"/2" Eyepiece

    Astro-Tech
    In Stock

    The Astro-Tech 3.5mm o-ring sealed 1.25"/2" eyepiece combines a high power capability with a 110° apparent field to provide a jaw-dropping observin...

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    $279.95 - $279.95
    $279.95
    $279.95 - $279.95
    $279.95
  • 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
    $149.99 - $149.99
    $149.99
    Save $80.00 Save $0.00
  • $31.95 - $31.95
    $31.95
    $31.95 - $31.95
    $31.95

    Celestron Omni 15mm 1.25" Plossl Eyepiece 93320

    Celestron
    More on the way

     This is a good quality medium power fully-multicoated eyepiece at a very economical price for the astronomer on a budget. It's designed for lunar ...

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    $31.95 - $31.95
    $31.95
    $31.95 - $31.95
    $31.95
  • 2.3mm X-Cel LX Series 1.25"
    $109.95 - $109.95
    $109.95
    $109.95 - $109.95
    $109.95

    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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    $109.95 - $109.95
    $109.95
    $109.95 - $109.95
    $109.95
  • $635.00 - $635.00
    $635.00
    $635.00 - $635.00
    $635.00

    Tele Vue 9mm Nagler Type 7 Eyepiece 1.25" and 2"

    TeleVue
    In Stock

    Nagler Type 7 Eyepieces – The Next Evolution in Immersive Astronomy   The Tele Vue Nagler Type 7 eyepiece series is the newest evolution in the leg...

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    $635.00 - $635.00
    $635.00
    $635.00 - $635.00
    $635.00
  • Sold out
    $119.99
    $119.99 - $119.99
    $119.99
    $49.99
    $49.99 - $49.99
    $49.99

    Explore Scientific 20mm 52° Series Waterproof Eyepiece

    Explore Scientific
    Sold Out

    Explore Scientific 20mm 52° Series Eyepiece – Wide-Field Views with Exceptional Clarity If you're looking for an eyepiece that delivers a balance o...

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    $119.99
    $119.99 - $119.99
    $119.99
    $49.99
    $49.99 - $49.99
    $49.99
    Sold out
  • Explore Scientific 62° 14mm 1.25" Waterproof Eyepiece
    Save $50.00 Save $0.00
    $149.99
    $149.99 - $149.99
    $149.99
    $99.99
    $99.99 - $99.99
    $99.99

    Explore Scientific 62° 14mm 1.25" Waterproof Eyepiece

    Explore Scientific
    In Stock

    Explore Scientific 14mm 62° Series 1.25" Waterproof Eyepiece The Explore Scientific 14mm 62° Series eyepiece is an excellent choice for amateur and...

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    $149.99
    $149.99 - $149.99
    $149.99
    $99.99
    $99.99 - $99.99
    $99.99
    Save $50.00 Save $0.00
  • $635.00 - $635.00
    $635.00
    $635.00 - $635.00
    $635.00

    Tele Vue 19mm Nagler Type 7 Eyepiece 2"

    TeleVue
    More on the way

    Nagler Type 7 Eyepieces – The Next Evolution in Immersive Astronomy   The Tele Vue Nagler Type 7 eyepiece series is the newest evolution in the leg...

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    $635.00 - $635.00
    $635.00
    $635.00 - $635.00
    $635.00
  • 5X Barlow for 1.25" eyepieces
    $199.99 - $199.99
    $199.99
    $199.99 - $199.99
    $199.99

    Explore Scientific 5X Barlow for 1.25" eyepieces

    Explore Scientific
    In Stock

    For high power with a short focal length refractor or reflector, this Explore Scientific four-element 5x image amplifier (Barlow lens) is hard to b...

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    $199.99 - $199.99
    $199.99
    $199.99 - $199.99
    $199.99
  • Save $50.00 Save $0.00
    $299.00
    $299.00 - $299.00
    $299.00
    $249.00
    $249.00 - $249.00
    $249.00

    Pentax 14mm 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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    $299.00
    $299.00 - $299.00
    $299.00
    $249.00
    $249.00 - $249.00
    $249.00
    Save $50.00 Save $0.00
  • 30mm 100° field argon-purged waterproof 3" eyepiece
    Save $600.00 Save $0.00
    $1,099.99
    $1,099.99 - $1,099.99
    $1,099.99
    $499.99
    $499.99 - $499.99
    $499.99

    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
    $499.99
    $499.99 - $499.99
    $499.99
    Save $600.00 Save $0.00
  • 19mm 2" 82° Luminos
    $199.95 - $199.95
    $199.95
    $199.95 - $199.95
    $199.95

    Celestron 19mm 2" 82° Luminos Eyepiece

    Celestron
    More on the way

    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
  • 15mm 1.25" 82° Luminos
    $139.95 - $139.95
    $139.95
    $139.95 - $139.95
    $139.95

    Celestron 15mm 1.25" 82° Luminos Eyepiece

    Celestron
    More on the way

    This exceptional Celestron 15mm Luminos 1.25" eyepiece uses seven optical elements for optimized performance across a very wide and flat 82° field ...

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    $139.95 - $139.95
    $139.95
    $139.95 - $139.95
    $139.95
  • 10mm 1.25" 82° Luminos
    $139.95 - $139.95
    $139.95
    $139.95 - $139.95
    $139.95

    Celestron 10mm 1.25" 82° Luminos Eyepiece

    Celestron
    More on the way

    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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    $139.95 - $139.95
    $139.95
    $139.95 - $139.95
    $139.95
  • 2.4X Dakin Barlow for 1.25" eyepieces
    $210.00 - $210.00
    $210.00
    $210.00 - $210.00
    $210.00

    Vernonscope Ralph Dakin 2.4X Dakin Barlow for 1.25" Eyepieces

    Vernonscope
    More on the way

    This Ralph Dakin doublet design is considered by many professional astronomers to be the Rolls-Royce of 1.25" Barlows. It has a magnification of 2....

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    $210.00 - $210.00
    $210.00
    $210.00 - $210.00
    $210.00
  • $31.95 - $31.95
    $31.95
    $31.95 - $31.95
    $31.95

    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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    $31.95 - $31.95
    $31.95
    $31.95 - $31.95
    $31.95
  • 1.50 Diopter Dioptrx astigmatism-correcting lens
    $122.00 - $122.00
    $122.00
    $122.00 - $122.00
    $122.00

    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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    $122.00 - $122.00
    $122.00
    $122.00 - $122.00
    $122.00
  • 1.00 Diopter Dioptrx astigmatism-correcting lens
    $122.00 - $122.00
    $122.00
    $122.00 - $122.00
    $122.00

    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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    $122.00 - $122.00
    $122.00
    $122.00 - $122.00
    $122.00
  • $635.00 - $635.00
    $635.00
    $635.00 - $635.00
    $635.00

    Tele Vue 14mm Nagler Type 7 Eyepiece 2"

    TeleVue
    In Stock

    Nagler Type 7 Eyepieces – The Next Evolution in Immersive Astronomy   The Tele Vue Nagler Type 7 eyepiece series is the newest evolution in the leg...

    View full details
    $635.00 - $635.00
    $635.00
    $635.00 - $635.00
    $635.00
  • 2.00 Diopter Dioptrx astigmatism-correcting lens
    $122.00 - $122.00
    $122.00
    $122.00 - $122.00
    $122.00

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

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