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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 28mm UWA 82° 2" Eyepiece

    Astro-Tech
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    This Astro-Tech 28mm waterproof eyepiece is a substantial 2" eyepiece that will give impressively sharp and contrasty wide field views of nebulas, ...

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  • 12mm 1.25" Paradigm Dual ED
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    Astro-Tech 12mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
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    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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  • 24mm illuminated reticle eyepiece
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    Astro-Tech 24mm Illuminated Reticle Eyepiece

    Astro-Tech
    In Stock

    The economical Astro-Tech #AT24IL illuminated reticle 1.25" eyepiece helps you align your go-to telescope on the sky, check your polar alignment fo...

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    $59.95
  • 5mm 1.25" Paradigm Dual ED
    $65.00 - $65.00
    $65.00
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    $65.00

    Astro-Tech 5mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
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    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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    $65.00
  • 8mm 1.25" Paradigm Dual ED
    $65.00 - $65.00
    $65.00
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    $65.00

    Astro-Tech 8mm 1.25" Paradigm Dual ED Eyepiece

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    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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    $119.95
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    $99.95
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    $99.95

    Astro-Tech 4mm UWA 82° 1.25" Eyepiece

    Astro-Tech
    In Stock

    This 4mm Astro-Tech 82° field eyepiece is an excellent very high power, very wide field eyepiece for resolving globular clusters and closely-spaced...

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  • 25mm 1.25" Paradigm Dual ED
    $65.00 - $65.00
    $65.00
    $65.00 - $65.00
    $65.00

    Astro-Tech 25mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
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    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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    $65.00
  • 15mm 1.25" Paradigm Dual ED
    $65.00 - $65.00
    $65.00
    $65.00 - $65.00
    $65.00

    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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    $65.00
  • Save $20.00 Save $0.00
    $119.95
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    $99.95
    $99.95 - $99.95
    $99.95

    Astro-Tech 7mm UWA 82° 1.25" Eyepiece

    Astro-Tech
    In Stock

    This 7mm Astro-Tech 82° field eyepiece is an excellent very high power, very wide field eyepiece for resolving globular clusters and closely-spaced...

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    $119.95
    $119.95 - $119.95
    $119.95
    $99.95
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    $99.95
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  • 18mm 1.25" Paradigm Dual ED
    $65.00 - $65.00
    $65.00
    $65.00 - $65.00
    $65.00

    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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    $65.00
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    $65.00
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    $119.95
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    $119.95
    $99.95
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    $99.95

    Astro-Tech 10mm UWA 82° 1.25" Eyepiece

    Astro-Tech
    In Stock

    This 10mm Astro-Tech 82° field eyepiece is an excellent medium to high power, very wide field eyepiece that will work well with any telescope. This...

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  • Astro-Tech 3.2mm 1.25" Paradigm Dual ED Eyepiece
    $65.00 - $65.00
    $65.00
    $65.00 - $65.00
    $65.00

    Astro-Tech 3.2mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
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    This Astro-Tech 3.2mm Paradigm Dual ED eyepiece is excellent for medium high to high power magnification viewing with short to medium focal length ...

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    $65.00 - $65.00
    $65.00
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    $65.00
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    $119.95
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    $119.95
    $99.95
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    $99.95

    Astro-Tech 16mm UWA 82° 1.25" Eyepiece

    Astro-Tech
    In Stock

    This 16mm Astro-Tech 82° field eyepiece will show you surprisingly wide deep space panoramas with any type or focal ratio telescope. This 82° 16mm ...

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    $119.95
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    $119.95
    $99.95
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    $99.95

    Astro-Tech 13mm UWA 82° 1.25" Eyepiece

    Astro-Tech
    In Stock

    This 13mm Astro-Tech 82° field eyepiece will show you surprisingly wide deep space panoramas with any type or focal ratio telescope. This 82° 13mm ...

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    $119.95
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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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    $279.95 - $279.95
    $279.95
    $279.95 - $279.95
    $279.95
  • $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
    $279.95
    $279.95 - $279.95
    $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
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    $279.95
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    $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
    $0.00
    $279.95
    $279.95 - $279.95
    $279.95
  • $40.00 - $40.00
    $40.00
    $40.00 - $40.00
    $40.00

    Astro-Tech 10.5mm 1.25" PF Eyepiece

    Astro-Tech
    In Stock

    This Astro-Tech 10.5mm PF series eyepiece has excellent eyerelief and a fantastic flat field to further enhance your viewing pleasure. This Astro-T...

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    $40.00
    $40.00 - $40.00
    $40.00

    Astro-Tech 5.5mm 1.25" PF Eyepiece

    Astro-Tech
    In Stock

    This Astro-Tech 5.5mm PF series eyepiece has excellent eyerelief and a fantastic flat field to further enhance your viewing pleasure. This Astro-Te...

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

    Astro-Tech 15.5mm 1.25" PF Eyepiece

    Astro-Tech
    In Stock

    This Astro-Tech 15.5mm PF series eyepiece has excellent eyerelief and a fantastic flat field to further enhance your viewing pleasure. This Astro-T...

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

    Astro-Tech 19mm 1.25" PF Eyepiece

    Astro-Tech
    In Stock

    This Astro-Tech 19mm PF series eyepiece has excellent eyerelief and a fantastic flat field to further enhance your viewing pleasure. So, I know som...

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    $40.00 - $40.00
    $40.00
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