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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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  • 23mm 2" 82° Luminos
    $239.95 - $239.95
    $239.95
    $239.95 - $239.95
    $239.95

    Celestron 23mm 2" 82° Luminos Eyepiece

    Celestron
    In Stock

    This 2" Celestron Luminos 23mm eyepiece is a six-lens design with a very wide 82° field and minimal field curvature. This makes it particularly wel...

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    $239.95 - $239.95
    $239.95
    $239.95 - $239.95
    $239.95
  • Save $50.00 Save $0.00
    $429.00
    $429.00 - $429.00
    $429.00
    $379.00
    $379.00 - $379.00
    $379.00

    Pentax 40mm XW Extra Wide Angle 2" Eyepiece

    Pentax
    In Stock

    This long focal length 2" Pentax eyepiece is outstanding for low power/wide field astronomical observing with long focal length refractors and cata...

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    $429.00
    $429.00 - $429.00
    $429.00
    $379.00
    $379.00 - $379.00
    $379.00
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  • Save $50.95 Save $0.00
    $499.95
    $499.95 - $499.95
    $499.95
    $449.00
    $449.00 - $449.00
    $449.00

    Pentax 23mm XW Extra Wide Angle Eyepiece

    Pentax
    In Stock

    This medium focal length Pentax provides sharp and very wide field images for both terrestrial and astronomical observing. Terrestrially, it is an ...

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    $499.95
    $499.95 - $499.95
    $499.95
    $449.00
    $449.00 - $449.00
    $449.00
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  • 3.00 Diopter Dioptrx astigmatism-correcting lens
    $134.00 - $134.00
    $134.00
    $134.00 - $134.00
    $134.00

    TeleVue 3.00 Diopter Dioptrx Astigmatism-Correcting Lens

    TeleVue
    In Stock

    This Dioptrx accessory lens corrects for an astigmatism of 3.00 diopters. (This would be a "CYL" value of 3.00 in your eyeglass prescription.)  The...

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    $134.00 - $134.00
    $134.00
    $134.00 - $134.00
    $134.00
  • $550.00 - $550.00
    $550.00
    $550.00 - $550.00
    $550.00

    Questar 16mm Cordless Reticle, for Use In Questar Starguide Only

    Questar
    More on the way

    This Questar #19151 16mm illuminated crosshair reticle eyepiece has a self-contained battery-powered variable intensity LED for guided long-exposur...

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    $550.00 - $550.00
    $550.00
    $550.00 - $550.00
    $550.00
  • $279.95 - $279.95
    $279.95
    $279.95 - $279.95
    $279.95

    Celestron Ultima Edge 30mm 2" Eyepiece 93454

    Celestron
    More on the way

    Highlights 30mm parfocal Ultra Flat Field eyepiece designed for 2” focusers Incredibly crisp views from center to edge of field Fully multi-coated...

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    $279.95 - $279.95
    $279.95
    $279.95 - $279.95
    $279.95
  • $249.95 - $249.95
    $249.95
    $249.95 - $249.95
    $249.95

    Celestron Ultima Edge 24mm 1.25" Eyepiece 93453

    Celestron
    More on the way

    Highlights 24mm Ultra Flat Field eyepiece designed for 1.25” focusers Incredibly crisp views from center to edge of field Fully multi-coated, 8-el...

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    $249.95 - $249.95
    $249.95
    $249.95 - $249.95
    $249.95
  • $159.95 - $159.95
    $159.95
    $159.95 - $159.95
    $159.95

    Celestron Ultima Edge 18mm 1.25" Eyepiece 93452

    Celestron
    More on the way

    Highlights 18mm parfocal Ultra Flat Field eyepiece designed for 1.25” focusers Incredibly crisp views from center to edge of field Fully multi-coa...

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    $159.95 - $159.95
    $159.95
    $159.95 - $159.95
    $159.95
  • $149.95 - $149.95
    $149.95
    $149.95 - $149.95
    $149.95

    Celestron Ultima Edge 15mm 1.25" Eyepiece 93451

    Celestron
    More on the way

    Highlights 15mm parfocal Ultra Flat Field eyepiece designed for 1.25” focusers Incredibly crisp views from center to edge of field Fully multi-coa...

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    $149.95 - $149.95
    $149.95
    $149.95 - $149.95
    $149.95
  • $99.95 - $99.95
    $99.95
    $99.95 - $99.95
    $99.95

    Celestron Ultima Edge 10mm 1.25" Eyepiece 93450

    Celestron
    More on the way

    Highlights 10mm parfocal Ultra Flat Field eyepiece designed for 1.25” focusers Incredibly crisp views from center to edge of field Fully multi-coa...

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    $99.95 - $99.95
    $99.95
    $99.95 - $99.95
    $99.95
  • $124.95 - $124.95
    $124.95
    $124.95 - $124.95
    $124.95

    Celestron Omni 56mm 2" Plossl 93328

    Celestron
    More on the way

    Highlights Ultra-long 56mm focal length provides low power views in telescopes with a long focal length, perfect for viewing wide-field deep sky o...

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    $124.95 - $124.95
    $124.95
    $124.95 - $124.95
    $124.95
  • $149.95 - $149.95
    $149.95
    $149.95 - $149.95
    $149.95

    Celestron 1.25" Observers Accessory Kit

    Celestron
    In Stock

    Highlights This Celestron eight-piece accessory kit enhances the performance of your telescope Includes two high-quality 1.25” Plossl eyepieces, a...

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    $149.95 - $149.95
    $149.95
    $149.95 - $149.95
    $149.95
  • $41.00 - $41.00
    $41.00
    $41.00 - $41.00
    $41.00

    Tele Vue Eyeguard Extender

    TeleVue
    In Stock

     Concept: Many Tele Vue eyepieces, such as DeLite, Delos, Nagler type 4, 55 Plössl, 41 Panoptic have adjustable height eyeguards to permit comforta...

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    $41.00 - $41.00
    $41.00
    $41.00 - $41.00
    $41.00
  • $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
  • Save $50.05 Save $0.00
    $269.99
    $269.99 - $269.99
    $269.99
    $219.94
    $219.94 - $219.94
    $219.94

    Explore Scientific 4.5mm 82 Degree 1.25" LER Waterproof Eyepiece

    Explore Scientific
    In Stock

    Explore Scientific has improved their already impressive 82 Degree line with this addition of a 4.5mm Long Eye Relief 1.25" waterproof eyepiece. Wi...

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    $269.99
    $269.99 - $269.99
    $269.99
    $219.94
    $219.94 - $219.94
    $219.94
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  • Save $50.05 Save $0.00
    $269.99
    $269.99 - $269.99
    $269.99
    $219.94
    $219.94 - $219.94
    $219.94

    Explore Scientific 8.5mm LER 82° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
    In Stock

    This 8.5mm Explore Scientific LER 82° field argon-purged waterproof eyepiece is the right focal length to give you very useful exit pupil sizes and...

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    $269.99
    $269.99 - $269.99
    $269.99
    $219.94
    $219.94 - $219.94
    $219.94
    Save $50.05 Save $0.00
  • Questar 6mm Brandon
    $300.00 - $300.00
    $300.00
    $300.00 - $300.00
    $300.00

    Questar 6mm Brandon Eyepiece

    Questar
    More on the way

    This is an excellent very high power eyepiece (best used with the 7" Questars) for observing lunar and planetary detail, resolving globular cluster...

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    $300.00 - $300.00
    $300.00
    $300.00 - $300.00
    $300.00

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