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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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  • 5mm XW extra wide angle eyepiece
    Save $50.00 Save $0.00
    $299.00
    $299.00 - $299.00
    $299.00
    $249.00
    $249.00 - $249.00
    $249.00

    Pentax 5mm XW Extra Wide Angle Eyepiece

    Pentax
    More on the way

    This short focal length Pentax eyepiece has a very wide 70° field of view and very long 20mm eye relief, a uniquely useful combination not matched ...

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    $299.00
    $299.00 - $299.00
    $299.00
    $249.00
    $249.00 - $249.00
    $249.00
    Save $50.00 Save $0.00
  • $106.00 - $106.00
    $106.00
    $106.00 - $106.00
    $106.00

    TeleVue 15mm Plössl Eyepiece

    TeleVue
    In Stock

    This is a very good medium power eyepiece for lunar observing, resolving globular clusters, picking up detail in the more compact emission and refl...

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    $106.00 - $106.00
    $106.00
    $106.00 - $106.00
    $106.00
  • $693.00 - $693.00
    $693.00
    $693.00 - $693.00
    $693.00

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

    TeleVue
    In Stock

    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
  • $270.00 - $270.00
    $270.00
    $270.00 - $270.00
    $270.00

    TeleVue 55mm Plössl Eyepiece

    TeleVue
    In Stock

    If you have a 2" focuser on your f/8 and longer focal ratio telescope, here's a 2" eyepiece that will give you the widest possible field of view - ...

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    $270.00 - $270.00
    $270.00
    $270.00 - $270.00
    $270.00
  • Save $50.00 Save $0.00
    $299.00
    $299.00 - $299.00
    $299.00
    $249.00
    $249.00 - $249.00
    $249.00

    Pentax 3.5mm XW Extra Wide Angle Eyepiece

    Pentax
    More on the way

    This very short focal length Pentax eyepiece has a wide 70° field of view combined with a long 20mm eye relief for eyeglass use. It's a combination...

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    $299.00
    $299.00 - $299.00
    $299.00
    $249.00
    $249.00 - $249.00
    $249.00
    Save $50.00 Save $0.00
  • 12mm 1.25" 72° field Delos
    $407.00 - $407.00
    $407.00
    $407.00 - $407.00
    $407.00

    TeleVue 12mm 1.25" 72° Field Delos Eyepiece

    TeleVue
    In Stock

    The 12mm TeleVue Delos puts the performance of the acclaimed TeleVue 13mm Ethos eyepiece - high contrast, a neutral color balance, and full field s...

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    $407.00 - $407.00
    $407.00
    $407.00 - $407.00
    $407.00
  • 12mm X-Cel LX Series 1.25"
    $109.95 - $109.95
    $109.95
    $109.95 - $109.95
    $109.95

    Celestron 12mm X-Cel LX Series 1.25" Eyepiece

    Celestron
    In Stock

    This medium focal length 12mm Celestron X-Cel LX Series six-element eyepiece is usable for high quality medium to medium high magnification observi...

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    $109.95 - $109.95
    $109.95
    $109.95 - $109.95
    $109.95
  • 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
    More on the way

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

    Celestron X-Cel LX 3X 3-Element Barlow For 1.25" Eyepieces 93428

    Celestron
    More on the way

    This three-power Celestron X-Cel LX 1.25" Barlow is an air-spaced three-lens fully multicoated Barlow that provides premium optical performance at ...

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    $124.95 - $124.95
    $124.95
    $124.95 - $124.95
    $124.95
  • $693.00 - $693.00
    $693.00
    $693.00 - $693.00
    $693.00

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

    TeleVue
    More on the way

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

    TeleVue 20mm Plössl Eyepiece

    TeleVue
    In Stock

    This is a very good medium power eyepiece for lunar observing, resolving globular clusters, picking up detail in emission and reflection nebulas, e...

    View full details
    $128.00 - $128.00
    $128.00
    $128.00 - $128.00
    $128.00
  • $241.00 - $241.00
    $241.00
    $241.00 - $241.00
    $241.00

    TeleVue 5X Powermate Image Amplifier for 1.25" Eyepieces

    TeleVue
    More on the way

    If you must wear glasses while observing, and you're looking for an ultra high power Barlow to get high magnifications from your favorite long foca...

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    $241.00 - $241.00
    $241.00
    $241.00 - $241.00
    $241.00
  • 8mm 1.25" 72° field Delos
    $407.00 - $407.00
    $407.00
    $407.00 - $407.00
    $407.00

    TeleVue 8mm 1.25" 72° Field Delos Eyepiece

    TeleVue
    In Stock

    The 8mm TeleVue Delos puts the performance of the original ground-breaking TeleVue 9mm Ethos eyepiece - high contrast, a neutral color balance, and...

    View full details
    $407.00 - $407.00
    $407.00
    $407.00 - $407.00
    $407.00
  • $239.95 - $239.95
    $239.95
    $239.95 - $239.95
    $239.95

    Astro-Tech 21mm UWA 82° 2" Eyepiece

    Astro-Tech
    In Stock

    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 - $239.95
    $239.95
  • Save $50.00 Save $0.00
    $299.00
    $299.00 - $299.00
    $299.00
    $249.00
    $249.00 - $249.00
    $249.00

    Pentax 20mm 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
    $299.00
    $299.00 - $299.00
    $299.00
    $249.00
    $249.00 - $249.00
    $249.00
    Save $50.00 Save $0.00
  • $106.00 - $106.00
    $106.00
    $106.00 - $106.00
    $106.00

    TeleVue 11mm Plössl Eyepiece

    TeleVue
    In Stock

    This is a very good medium high to high power eyepiece (the power depends on the focal length of your scope) for resolving globular clusters, picki...

    View full details
    $106.00 - $106.00
    $106.00
    $106.00 - $106.00
    $106.00
  • $141.00 - $141.00
    $141.00
    $141.00 - $141.00
    $141.00

    TeleVue 3X Barlow for 1.25" Eyepieces

    TeleVue
    In Stock

    If you need a high quality, medium high power Barlow for 1.25" eyepieces, look no further than this TeleVue. It's a 2-lens achromatic design with s...

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    $141.00 - $141.00
    $141.00
    $141.00 - $141.00
    $141.00
  • 7mm X-Cel LX Series 1.25"
    $109.95 - $109.95
    $109.95
    $109.95 - $109.95
    $109.95

    Celestron 7mm X-Cel LX Series 1.25" Eyepiece

    Celestron
    In Stock

    This short focal length 7mm Celestron X-Cel LX Series six-element eyepiece is an economical choice for high quality/high magnification observing an...

    View full details
    $109.95 - $109.95
    $109.95
    $109.95 - $109.95
    $109.95
  • $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
  • $838.00 - $838.00
    $838.00
    $838.00 - $838.00
    $838.00

    TeleVue 17mm 2" 100° Field Ethos Eyepiece

    TeleVue
    In Stock

    The 17mm TeleVue Ethos 100° field eyepiece is designed for no-holds-barred medium power deep space use with telescopes having focal ratios down to ...

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    $838.00 - $838.00
    $838.00
    $838.00 - $838.00
    $838.00
  • $693.00 - $693.00
    $693.00
    $693.00 - $693.00
    $693.00

    TeleVue 3.7mm 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 ...

    View full details
    $693.00 - $693.00
    $693.00
    $693.00 - $693.00
    $693.00
  • $106.00 - $106.00
    $106.00
    $106.00 - $106.00
    $106.00

    TeleVue 8mm Plössl Eyepiece

    TeleVue
    In Stock

    This is a very good medium high to high power eyepiece (the power depends on the focal length of your scope) for observing lunar and planetary deta...

    View full details
    $106.00 - $106.00
    $106.00
    $106.00 - $106.00
    $106.00
  • $354.00 - $354.00
    $354.00
    $354.00 - $354.00
    $354.00

    TeleVue 3.5mm Nagler Type 6 Eyepiece

    TeleVue
    In Stock

    This is an exceptional short focal length ultra wide field eyepiece. It uses seven optical elements for optimized performance across a very wide fi...

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    $354.00 - $354.00
    $354.00
    $354.00 - $354.00
    $354.00
  • $354.00 - $354.00
    $354.00
    $354.00 - $354.00
    $354.00

    TeleVue 5mm Nagler Type 6 Eyepiece

    TeleVue
    In Stock

    This is an optically superb short focal length ultra wide field eyepiece designed as an upgrade to the famed original 4.8mm Nagler. Due to the sign...

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    $354.00 - $354.00
    $354.00
    $354.00 - $354.00
    $354.00

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