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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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  • 24mm 68° field argon-purged waterproof 1.25" eyepiece
    $269.99 - $269.99
    $269.99
    $269.99 - $269.99
    $269.99

    Explore Scientific 24mm 68° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
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    This Explore Scientific 24mm argon-purged eyepiece has a wide 68° field that gives impressively sharp and contrasty medium power images with virtua...

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    $269.99 - $269.99
    $269.99
    $269.99 - $269.99
    $269.99
  • $229.99 - $229.99
    $229.99
    $229.99 - $229.99
    $229.99

    Explore Scientific 14mm 82° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
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    This medium power 14mm Explore Scientific 82° field argon-purged eyepiece will show you surprisingly wide deep space panoramas with any type or foc...

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    $229.99 - $229.99
    $229.99
    $229.99 - $229.99
    $229.99
  • 11mm 82° field argon-purged waterproof 1.25" eyepiece
    $229.99 - $229.99
    $229.99
    $229.99 - $229.99
    $229.99

    Explore Scientific 11mm 82° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
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    The "picture window on space" viewing experience of this 82° field Explore Scientific 11mm 1.25" argon-purged eyepiece gives you the magnification ...

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    $229.99 - $229.99
    $229.99
    $229.99 - $229.99
    $229.99
  • 8.8mm 82° field argon-purged waterproof 1.25" eyepiece
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    $229.99 - $229.99
    $229.99
    $229.99 - $229.99
    $229.99

    Explore Scientific 8.8mm 82° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
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    This Product Has Been Discontinued And This Is Here for Informational Purposes Only. It Is No Longer For  Sale. This 8.8mm Explore Scientific 82° f...

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    $229.99 - $229.99
    $229.99
    $229.99 - $229.99
    $229.99

    Explore Scientific 4.7mm 82° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
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    This Product Has Been Discontinued And This Is Here for Informational Purposes Only. It Is No Longer For  Sale. This 4.7mm Explore Scientific 82° f...

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    $229.99 - $229.99
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  • 6.7mm 82° field argon-purged waterproof 1.25" eyepiece
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    $229.99 - $229.99
    $229.99
    $229.99 - $229.99
    $229.99

    Explore Scientific 6.7mm 82° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
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    This Product Has Been Discontinued And This Is Here for Informational Purposes Only. It Is No Longer For  Sale. This high power 6.7mm Explore Scien...

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    $229.99 - $229.99
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    $229.99 - $229.99
    $229.99
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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
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    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
  • 18mm 82° field argon-purged waterproof 2" eyepiece
    $319.99 - $319.99
    $319.99
    $319.99 - $319.99
    $319.99

    Explore Scientific 18mm 82° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
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    This 82° field Explore Scientific 18mm 2" argon-purged waterproof eyepiece makes observing with many telescopes feel like you're taking a stroll th...

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    $319.99 - $319.99
    $319.99
    $319.99 - $319.99
    $319.99
  • 30mm 82° field argon-purged waterproof 2" eyepiece
    $499.99 - $499.99
    $499.99
    $499.99 - $499.99
    $499.99

    Explore Scientific 30mm 82° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
    In Stock

    This 82° field Explore Scientific 30mm 2" argon-purged waterproof eyepiece gives you the big picture, making you feel like you're relaxing in front...

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    $499.99 - $499.99
    $499.99
    $499.99 - $499.99
    $499.99
  • 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
  • $439.99 - $439.99
    $439.99
    $439.99 - $439.99
    $439.99

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

    Explore Scientific
    In Stock

    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
  • 2X Barlow for 2" eyepieces, with 1.25" adapter
    $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $299.99

    Explore Scientific 2X Barlow for 2" eyepieces, with 1.25" adapter

    Explore Scientific
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    This new four-element 2" 2x Explore Scientific focal extender (Barlow lens) has a 1.25" eyepiece adapter so you can use both 2" and 1.25" eyepieces...

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    $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $299.99
  • $149.99 - $149.99
    $149.99
    $149.99 - $149.99
    $149.99

    Explore Scientific 30mm 52° Series Waterproof Eyepiece

    Explore Scientific
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    Explore Scientific 30mm 52° Series Argon-Purged Waterproof Eyepiece The Explore Scientific 30mm 52° Series eyepiece offers an exceptional balance o...

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    $149.99 - $149.99
    $149.99
    $149.99 - $149.99
    $149.99
  • 16mm 68° field argon-purged waterproof 1.25" eyepiece
    $219.99 - $219.99
    $219.99
    $219.99 - $219.99
    $219.99

    Explore Scientific 16mm 68° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
    In Stock

    This Explore Scientific 16mm argon-purged eyepiece is a truly fine medium power eyepiece with a substantial 68° field of view that can provide a co...

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    $219.99 - $219.99
    $219.99
    $219.99 - $219.99
    $219.99
  • $89.99 - $89.99
    $89.99
    $89.99 - $89.99
    $89.99

    Explore Scientific 4.5mm 52° Series Waterproof Eyepiece

    Explore Scientific
    In Stock

    Explore Scientific 4.5mm 52° Series Argon-Purged Eyepiece Precision optics and comfortable viewing come together in the Explore Scientific 4.5mm 52...

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    $89.99 - $89.99
    $89.99
    $89.99 - $89.99
    $89.99
  • Explore Scientific 62° 9mm 1.25" Waterproof Eyepiece
    $149.99 - $149.99
    $149.99
    $149.99 - $149.99
    $149.99

    Explore Scientific 9mm 62° 1.25" Waterproof Eyepiece

    Explore Scientific
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    Explore Scientific 9mm 62° 1.25" Waterproof Eyepiece The Explore Scientific 9mm 62° Series 1.25" eyepiece brings together solid performance, qualit...

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    $149.99 - $149.99
    $149.99
    $149.99 - $149.99
    $149.99
  • 3X Barlow for 1.25" eyepieces
    $209.99 - $209.99
    $209.99
    $209.99 - $209.99
    $209.99

    Explore Scientific 3X Barlow for 1.25" eyepieces

    Explore Scientific
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    This new four-element 1.25" 3x Explore Scientific focal extender (Barlow lens) triples the power of any eyepiece used with it, with flat-field and ...

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    $209.99 - $209.99
    $209.99
    $209.99 - $209.99
    $209.99
  • 12mm 92° field argon-purged waterproof 2" eyepiece
    $799.99 - $799.99
    $799.99
    $799.99 - $799.99
    $799.99

    Explore Scientific 12mm 92° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
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    This 2" 12mm 92° field Explore Scientific hyper-wide eyepiece provides an exceptionally immersive medium/medium high power observing experience. Yo...

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    $799.99 - $799.99
    $799.99
    $799.99 - $799.99
    $799.99
  • 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 - $799.99
    $799.99
    $799.99 - $799.99
    $799.99
  • Explore Scientific 62° 40mm 2" Waterproof Eyepiece
    $289.99 - $289.99
    $289.99
    $289.99 - $289.99
    $289.99

    Explore Scientific 40mm 62° 2" Waterproof Eyepiece

    Explore Scientific
    In Stock

    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 - $289.99
    $289.99
  • 40mm 68° field argon-purged waterproof 2" eyepiece
    $519.99 - $519.99
    $519.99
    $519.99 - $519.99
    $519.99

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

    Explore Scientific
    In Stock

    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 - $519.99
    $519.99
  • $119.99 - $119.99
    $119.99
    $119.99 - $119.99
    $119.99

    Explore Scientific 6.5mm 52° Series Waterproof Eyepiece

    Explore Scientific
    In Stock

    Explore Scientific 6.5mm 52° Argon-Purged Waterproof Eyepiece A high-quality eyepiece is one of the best investments you can make in your telescope...

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    $119.99 - $119.99
    $119.99
    $119.99 - $119.99
    $119.99
  • $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $299.99

    Explore Scientific 2" 3x Focal Extender (Barlow)

    Explore Scientific
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    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

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