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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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    Astro-Tech 5mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
    More on the way

    This Astro-Tech 5mm Paradigm Dual ED eyepiece is excellent for medium to medium high magnification viewing with short to medium focal length refrac...

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    $69.95
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    $69.95
    $69.95 - $69.95
    $69.95

    Astro-Tech 12mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
    In Stock

    This Astro-Tech 12mm Paradigm Dual ED medium power eyepiece has outstanding performance at a price that will make you wonder why other good quality...

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    $69.95
    $69.95 - $69.95
    $69.95

    Astro-Tech 8mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
    In Stock

    This Astro-Tech 8mm Paradigm Dual ED eyepiece is a logical choice for high quality/high magnification observing with long focal length refractors, ...

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    $299.95
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    $299.95

    Astro-Tech 20mm 100° Field Waterproof XWA 2" Eyepiece

    Astro-Tech
    In Stock

    The 100° apparent field of the Astro-Tech 20mm waterproof 2" eyepiece provides superb maximum field/medium power observing in all scopes, from smal...

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    $299.95
    $299.95 - $299.95
    $299.95
  • $69.95 - $69.95
    $69.95
    $69.95 - $69.95
    $69.95

    Astro-Tech 25mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
    In Stock

    This Astro-Tech 25mm Paradigm Dual ED is an excellent medium to low power eyepiece for encompassing open clusters, picking up detail in emission an...

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    $69.95
    $69.95 - $69.95
    $69.95

    Astro-Tech 15mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
    In Stock

    This Astro-Tech 15mm Paradigm Dual ED eyepiece gives you the outstanding medium power performance of a high-priced eyepiece at a price that will ma...

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    $69.95
    $69.95 - $69.95
    $69.95

    Astro-Tech 18mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
    In Stock

    This Astro-Tech 18mm Paradigm Dual ED is an excellent medium to medium low power eyepiece for lunar observing, encompassing globular clusters, pick...

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

    Astro-Tech 13mm 100° Field Waterproof 1.25"/2" Eyepiece

    Astro-Tech
    In Stock

    The Astro-Tech 13mm o-ring sealed 1.25"/2" eyepiece combines a high power capability with a 100° apparent field to provide a jaw-dropping observing...

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  • $40.00 - $40.00
    $40.00
    $40.00 - $40.00
    $40.00

    Astro-Tech 25mm 1.25" PF Eyepiece

    Astro-Tech
    In Stock

    Looking to upgrade your standard 25/26mm eyepiece? Look no further than the Astro-Tech 25mm PF series eyepiece. So, I know someone will wonder what...

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    $40.00
  • $279.95 - $279.95
    $279.95
    $279.95 - $279.95
    $279.95

    Astro-Tech 7mm 100° Field Waterproof 1.25"/2" Eyepiece

    Astro-Tech
    In Stock

    The Astro-Tech 7mm o-ring sealed 1.25"/2" eyepiece combines a high power capability with a 100° apparent field to provide a jaw-dropping observing ...

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    $279.95 - $279.95
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    $279.95
  • $0.00 - $0.00
    $0.00
    $279.95
    $279.95 - $279.95
    $279.95

    Astro-Tech 4.8mm 110° Field Waterproof 1.25"/2" Eyepiece

    Astro-Tech
    In Stock

    The Astro-Tech 4.8mm 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
  • $0.00 - $0.00
    $0.00
    $279.95
    $279.95 - $279.95
    $279.95

    Astro-Tech 9mm 100° Field Waterproof 1.25"/2" Eyepiece

    Astro-Tech
    In Stock

    The Astro-Tech 9mm o-ring sealed 1.25"/2" eyepiece combines a high power capability with a 100° apparent field to provide a jaw-dropping observing ...

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    $0.00 - $0.00
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    $279.95
    $279.95 - $279.95
    $279.95
  • $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
    More on the way

    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
  • 13mm 1.25"/2" 100° field Ethos
    $693.00 - $693.00
    $693.00
    $693.00 - $693.00
    $693.00

    TeleVue 13mm 1.25"/2" 100° Field Ethos

    TeleVue
    In Stock

    The 100° apparent field of this new TeleVue 13mm Ethos eyepiece provides a field area more than 50% larger than the "space-walking" 82° field of a ...

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    $693.00 - $693.00
    $693.00
    $693.00 - $693.00
    $693.00
  • 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
    More on the way

    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
  • $128.00 - $128.00
    $128.00
    $128.00 - $128.00
    $128.00

    TeleVue 25mm Plössl Eyepiece

    TeleVue
    In Stock

    This is a very good medium to low power (depending on the focal length of your telescope) eyepiece for lunar observing, viewing emission and reflec...

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    $128.00 - $128.00
    $128.00
    $128.00 - $128.00
    $128.00
  • $941.00 - $941.00
    $941.00
    $941.00 - $941.00
    $941.00

    TeleVue 21mm 2" 100° Field Ethos Eyepiece

    TeleVue
    In Stock

    With a 21mm focal length, the field of this 100° apparent field Ethos eyepiece is nearly 64% larger in area than the 82° field of a "space-walking"...

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    $941.00 - $941.00
    $941.00
    $941.00 - $941.00
    $941.00
  • $651.00 - $651.00
    $651.00
    $651.00 - $651.00
    $651.00

    TeleVue 8mm 1.25"/2" 100° Field Ethos Eyepiece

    TeleVue
    In Stock

    The TeleVue 8mm Ethos eyepiece raises the bar for shorter focal length eyepieces. It expands the apparent field of view to an astonishing 100°, whi...

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    $651.00 - $651.00
    $651.00
    $651.00 - $651.00
    $651.00
  • Sold out
    $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
    Sold Out

    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
    $229.99
    $229.99 - $229.99
    $229.99
    Sold out
  • 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
    In Stock

    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
  • $651.00 - $651.00
    $651.00
    $651.00 - $651.00
    $651.00

    TeleVue 6mm 1.25"/2" 100° Field Ethos Eyepiece

    TeleVue
    More on the way

    Just like the 8mm TeleVue Ethos before it, the TeleVue 6mm Ethos eyepiece once again raises the bar for shorter focal length eyepieces. It expands ...

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    $651.00 - $651.00
    $651.00
    $651.00 - $651.00
    $651.00
  • 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
    More on the way

    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
  • $693.00 - $693.00
    $693.00
    $693.00 - $693.00
    $693.00

    TeleVue 4.7mm 1.25"/2" 110° Field Ethos-SX Eyepiece

    TeleVue
    More on the way

    Nearly half a century ago, Al Nagler designed the optics for the LEM (Lunar Excursion Module) simulator that was used to train NASA astronauts how ...

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    $693.00 - $693.00
    $693.00
    $693.00 - $693.00
    $693.00
  • $693.00 - $693.00
    $693.00
    $693.00 - $693.00
    $693.00

    TeleVue 10mm 1.25"/2" 100° Field Ethos Eyepiece

    TeleVue
    In Stock

    The 10mm TeleVue Ethos is a "do-it-all" eyepiece that is perfect for all telescopes that can utilize this focal length. And, as it fills the hole b...

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    $693.00 - $693.00
    $693.00
    $693.00 - $693.00
    $693.00

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