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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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  • $119.95 - $119.95
    $119.95
    $119.95 - $119.95
    $119.95

    Astro-Tech 9mm to 27mm 1.25" Zoom Eyepiece

    Astro-Tech
    In Stock

    This 9mm to 27mm Astro-Tech zoom eyepiece is a fantastic choice for astronomers of every experience level. This Astro-Tech 9mm to 27mm zoom eyepiec...

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    $119.95 - $119.95
    $119.95
    $119.95 - $119.95
    $119.95
  • Questar 24mm Brandon
    $300.00 - $300.00
    $300.00
    $300.00 - $300.00
    $300.00

    Questar 24mm Brandon Eyepiece

    Questar
    More on the way

    This is an excellent medium to low power eyepiece (53x and 80x in the 3.5" Questar) for lunar observing, resolving globular clusters, viewing the m...

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    $300.00 - $300.00
    $300.00
    $300.00 - $300.00
    $300.00
  • Questar 16mm Brandon
    $300.00 - $300.00
    $300.00
    $300.00 - $300.00
    $300.00

    Questar 16mm Brandon Eyepiece

    Questar
    More on the way

    This is an excellent medium power eyepiece for lunar observing, resolving globular clusters, picking up details in the more compact emission and re...

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    $300.00 - $300.00
    $300.00
    $300.00 - $300.00
    $300.00
  • 32mm Brandon "flat top"
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 32mm Brandon "Flat Top" Eyepiece

    Vernonscope
    More on the way

    The 32mm Vernonscope Brandon "flat top" eyepiece is designed for nigh-perfect low power deep sky observing with any telescope type, at focal ratios...

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    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 24mm Brandon "flat top"
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 24mm Brandon "Flat Top" Eyepiece

    Vernonscope
    More on the way

    The 24mm Vernonscope Brandon "flat top" eyepiece is designed for nigh-perfect medium power deep sky observing with any telescope type, at focal rat...

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    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 8mm Brandon "flat top"
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 8mm Brandon Flat Top Eyepiece

    Vernonscope
    More on the way

    The 8mm Vernonscope Brandon "flat top" eyepiece is designed for high power use with any telescope type, at focal ratios f/7 and above. It provides ...

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    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 2" 48mm Brandon
    $375.00 - $375.00
    $375.00
    $375.00 - $375.00
    $375.00

    Vernonscope 2" 48mm Brandon Eyepiece

    Vernonscope
    More on the way

    The 2" 48mm Vernonscope Brandon eyepiece is designed for nigh-perfect low power deep sky observing with any telescope type that can use 2" eyepiece...

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    $375.00 - $375.00
    $375.00
    $375.00 - $375.00
    $375.00
  • 16mm Brandon
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 16mm Brandon Eyepiece

    Vernonscope
    More on the way

    The 16mm Vernonscope Brandon eyepiece is designed for medium power high contrast/dark sky background use with any telescope type, at focal ratios f...

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    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 0.25 Diopter Dioptrx astigmatism-correcting lens
    $109.00 - $109.00
    $109.00
    $109.00 - $109.00
    $109.00

    TeleVue 0.25 Diopter Dioptrx Astigmatism-Correcting Lens

    TeleVue
    In Stock

    This Dioptrx accessory lens corrects for an astigmatism of 0.25 diopter. (This would be a"CYL" value of 0.25 in your eyeglass prescription.)  The l...

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    $109.00 - $109.00
    $109.00
    $109.00 - $109.00
    $109.00
  • 2.50 Diopter Dioptrx astigmatism-correcting lens
    $134.00 - $134.00
    $134.00
    $134.00 - $134.00
    $134.00

    TeleVue 2.50 Diopter Dioptrx Astigmatism-Correcting Lens

    TeleVue
    In Stock

    This Dioptrx accessory lens corrects for an astigmatism of 2.5 diopters. (This would be a "CYL" value of 2.50 in your eyeglass prescription.)  The ...

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    $134.00 - $134.00
    $134.00
    $134.00 - $134.00
    $134.00
  • Questar 12mm Brandon
    $300.00 - $300.00
    $300.00
    $300.00 - $300.00
    $300.00

    Questar 12mm Brandon Eyepiece

    Questar
    More on the way

    This is an excellent medium high to high power eyepiece (108x and 162x in the 3.5" Questar) for observing lunar and planetary detail, resolving glo...

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    $300.00 - $300.00
    $300.00
    $300.00 - $300.00
    $300.00
  • 6mm Brandon "flat top"
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 6mm Brandon "Flat Top" Eyepiece

    Vernonscope
    More on the way

    The 6mm Vernonscope Brandon "flat top" eyepiece is designed for very high power use with any telescope type, at focal ratios f/7 and above. It prov...

    View full details
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 16mm Brandon "flat top"
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 16mm Brandon "Flat Top" Eyepiece

    Vernonscope
    More on the way

    The 16mm Vernonscope Brandon "flat top" eyepiece is designed for medium power high contrast/dark sky background use with any telescope type, at foc...

    View full details
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 8mm Brandon
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 8mm Brandon Eyepiece

    Vernonscope
    More on the way

    The 8mm Vernonscope Brandon eyepiece is designed for high power use with any telescope type, at focal ratios f/7 and above. It provides highly deta...

    View full details
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 32mm Brandon
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 32mm Brandon Eyepiece

    Vernonscope
    More on the way

    The 32mm Vernonscope Brandon eyepiece is designed for nigh-perfect low power deep sky observing with any telescope type, at focal ratios f/7 and ab...

    View full details
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 24mm Brandon
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 24mm Brandon Eyepiece

    Vernonscope
    More on the way

    The 24mm Vernonscope Brandon eyepiece is designed for nigh-perfect medium power deep sky observing with any telescope type, at focal ratios f/7 and...

    View full details
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • 12mm Brandon
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00

    Vernonscope 12mm Brandon Eyepiece

    Vernonscope
    More on the way

    The 12mm Vernonscope Brandon eyepiece is designed for high power use with any telescope type, at focal ratios f/7 and above. It provides highly det...

    View full details
    $279.00 - $279.00
    $279.00
    $279.00 - $279.00
    $279.00
  • Save $50.95 Save $0.00
    $479.95
    $479.95 - $479.95
    $479.95
    $429.00
    $429.00 - $429.00
    $429.00

    Pentax 16.5mm XW Extra Wide Angle Eyepiece

    Pentax
    More on the way

    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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    $479.95
    $479.95 - $479.95
    $479.95
    $429.00
    $429.00 - $429.00
    $429.00
    Save $50.95 Save $0.00
  • 3.50 Diopter Dioptrx astigmatism-correcting lens
    $134.00 - $134.00
    $134.00
    $134.00 - $134.00
    $134.00

    TeleVue 3.50 Diopter Dioptrx Astigmatism-Correcting Lens

    TeleVue
    In Stock

    This Dioptrx accessory lens corrects for an astigmatism of 3.50 diopters. (This would be a "CYL" value of 3.50 in your eyeglass prescription.)  The...

    View full details
    $134.00 - $134.00
    $134.00
    $134.00 - $134.00
    $134.00
  • Save $40.00 Save $0.00
    $239.95
    $239.95 - $239.95
    $239.95
    $199.95
    $199.95 - $199.95
    $199.95

    Astro-Tech 21mm UWA 82° 2" Eyepiece

    Astro-Tech
    More on the way

    This Astro-Tech 21mm waterproof eyepiece is a substantial 2" eyepiece that will give impressively sharp and contrasty wide field views of nebulas, ...

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    $239.95
    $239.95 - $239.95
    $239.95
    $199.95
    $199.95 - $199.95
    $199.95
    Save $40.00 Save $0.00
  • 8-24mm SMC 1.25" long eye relief astronomical zoom; 21-63x or 26-78x spotting scope zoom
    $359.00 - $359.00
    $359.00
    $359.00 - $359.00
    $359.00

    Pentax 8-24mm SMC 1.25" Long Eye Relief Astronomical Zoom; 21-63x or 26-78x Spotting Scope Zoom

    Pentax
    More on the way

    This is an ultra-premium six-element zoom eyepiece. It has a long eye relief that's particularly well-suited to those who must wear eyeglasses whil...

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    $359.00 - $359.00
    $359.00
    $359.00 - $359.00
    $359.00
  • 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
    Save $50.00 Save $0.00
  • 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 ...

    View full details
    $499.95
    $499.95 - $499.95
    $499.95
    $449.00
    $449.00 - $449.00
    $449.00
    Save $50.95 Save $0.00

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