Skip to content

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.

Filters

  • Original price $239.95
    Original price $239.95 - Original price $239.95
    Original price $239.95
    Current price $199.95
    $199.95 - $199.95
    Current price $199.95

    Astro-Tech 28mm UWA 82° 2" Eyepiece

    Astro-Tech
    More on the way

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

    View full details
    Original price $239.95
    Original price $239.95 - Original price $239.95
    Original price $239.95
    Current price $199.95
    $199.95 - $199.95
    Current price $199.95
    Save $40.00 Save $0.00
  • Original price $0.00 - Original price $0.00
    Original price $0.00
    $299.95
    $299.95 - $299.95
    Current price $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...

    View full details
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $299.95
    $299.95 - $299.95
    Current price $299.95
  • Original price $342.01 - Original price $342.01
    Original price
    $342.01
    $342.01 - $342.01
    Current price $342.01

    TeleVue 2X Powermate Image Amplifier for 2" Eyepieces, with 1.25" Eyepiece Adapter

    TeleVue
    In Stock

    If you need a very high quality 2x Barlow for 2" eyepieces, look no further than this TeleVue Powermate. While not technically a Barlow, this uniqu...

    View full details
    Original price $342.01 - Original price $342.01
    Original price
    $342.01
    $342.01 - $342.01
    Current price $342.01
  • Original price $697.01 - Original price $697.01
    Original price
    $697.01
    $697.01 - $697.01
    Current price $697.01

    TeleVue 31mm 2" Nagler Type 5 Eyepiece

    TeleVue
    More on the way

    This Nagler Type Five eyepiece uses a new six-lens design that reduces the size and weight of this 31mm eyepiece to less than that of the previous ...

    View full details
    Original price $697.01 - Original price $697.01
    Original price
    $697.01
    $697.01 - $697.01
    Current price $697.01
  • Original price $149.95 - Original price $149.95
    Original price
    $149.95
    $149.95 - $149.95
    Current price $149.95

    Celestron Luminos 2.5X 4-Element Barlow For 2" And 1.25" Eyepieces 93436

    Celestron
    In Stock

    This 2.5x magnification Celestron Luminos 2" Barlow uses a four-lens fully multicoated optical system to provide a flat field and apochromatic-qual...

    View full details
    Original price $149.95 - Original price $149.95
    Original price
    $149.95
    $149.95 - $149.95
    Current price $149.95
  • Original price $349.01 - Original price $349.01
    Original price
    $349.01
    $349.01 - $349.01
    Current price $349.01

    TeleVue 4X Powermate Image Amplifier for 2" Eyepieces, with 1.25" Eyepiece Adapter

    TeleVue
    In Stock

    If you need a very high quality, very high power 4x Barlow for 2" eyepieces, look no further than this TeleVue Powermate. While not technically a B...

    View full details
    Original price $349.01 - Original price $349.01
    Original price
    $349.01
    $349.01 - $349.01
    Current price $349.01
  • Original price $894.00 - Original price $894.00
    Original price
    $894.00
    $894.00 - $894.00
    Current price $894.00

    TeleVue 21mm 2" 100° Field Ethos Eyepiece

    TeleVue
    More on the way

    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"...

    View full details
    Original price $894.00 - Original price $894.00
    Original price
    $894.00
    $894.00 - $894.00
    Current price $894.00
  • Original price $499.99 - Original price $499.99
    Original price
    $499.99
    $499.99 - $499.99
    Current price $499.99

    Explore Scientific 30mm 82° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
    In Stock

    This 82° field Explore Scientific 30mm 2" argon-purged waterproof eyepiece gives you the big picture, making you feel like you're relaxing in front...

    View full details
    Original price $499.99 - Original price $499.99
    Original price
    $499.99
    $499.99 - $499.99
    Current price $499.99
  • Original price $379.01 - Original price $379.01
    Original price
    $379.01
    $379.01 - $379.01
    Current price $379.01

    TeleVue 27mm 2" Panoptic Eyepiece

    TeleVue
    More on the way

    An excellent premium-quality low power wide field 2" eyepiece for the serious deep space explorer. The 27mm Panoptic, for example, will give you a ...

    View full details
    Original price $379.01 - Original price $379.01
    Original price
    $379.01
    $379.01 - $379.01
    Current price $379.01
  • Original price $487.00 - Original price $487.00
    Original price
    $487.00
    $487.00 - $487.00
    Current price $487.00

    TeleVue 22mm 2" Nagler Type 4 Eyepiece

    TeleVue
    More on the way

    The TeleVue 2" 22mm Nagler Type 4 replaces the 20mm Nagler Type 2, considered by many to be the finest eyepiece ever made. How do you improve on a ...

    View full details
    Original price $487.00 - Original price $487.00
    Original price
    $487.00
    $487.00 - $487.00
    Current price $487.00
  • Original price $575.01 - Original price $575.01
    Original price
    $575.01
    $575.01 - $575.01
    Current price $575.01

    TeleVue 41mm 2" Panoptic Eyepiece

    TeleVue
    More on the way

    This is a premium-quality wide field 2" eyepiece for the serious deep space explorer. Because of its long focal length, it is at its best with tele...

    View full details
    Original price $575.01 - Original price $575.01
    Original price
    $575.01
    $575.01 - $575.01
    Current price $575.01
  • Original price $427.01 - Original price $427.01
    Original price
    $427.01
    $427.01 - $427.01
    Current price $427.01

    TeleVue 35mm 2" Panoptic Eyepiece

    TeleVue
    In Stock

    An excellent and physically-impressive premium-quality low power wide field 2" eyepiece for the serious deep space explorer. The Tele Vue 35mm Pano...

    View full details
    Original price $427.01 - Original price $427.01
    Original price
    $427.01
    $427.01 - $427.01
    Current price $427.01
  • Original price $319.99 - Original price $319.99
    Original price
    $319.99
    $319.99 - $319.99
    Current price $319.99

    Explore Scientific 18mm 82° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
    In Stock

    This 82° field Explore Scientific 18mm 2" argon-purged waterproof eyepiece makes observing with many telescopes feel like you're taking a stroll th...

    View full details
    Original price $319.99 - Original price $319.99
    Original price
    $319.99
    $319.99 - $319.99
    Current price $319.99
  • Original price $439.99 - Original price $439.99
    Original price
    $439.99
    $439.99 - $439.99
    Current price $439.99

    Explore Scientific 24mm 82° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
    More on the way

    This 82° field Explore Scientific 24mm 2" argon-purged waterproof eyepiece makes observing feel like you're relaxing in front of a picture window o...

    View full details
    Original price $439.99 - Original price $439.99
    Original price
    $439.99
    $439.99 - $439.99
    Current price $439.99
  • Original price $299.99 - Original price $299.99
    Original price
    $299.99
    $299.99 - $299.99
    Current price $299.99

    Explore Scientific 28mm 68° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
    More on the way

    This Explore Scientific 28mm argon-purged is a substantial 2" eyepiece that gives impressively sharp and contrasty wide field views of nebulas, com...

    View full details
    Original price $299.99 - Original price $299.99
    Original price
    $299.99
    $299.99 - $299.99
    Current price $299.99
  • Original price $299.99 - Original price $299.99
    Original price
    $299.99
    $299.99 - $299.99
    Current price $299.99

    Explore Scientific 2X Barlow for 2" eyepieces, with 1.25" adapter

    Explore Scientific
    In Stock

    This new four-element 2" 2x Explore Scientific focal extender (Barlow lens) has a 1.25" eyepiece adapter so you can use both 2" and 1.25" eyepieces...

    View full details
    Original price $299.99 - Original price $299.99
    Original price
    $299.99
    $299.99 - $299.99
    Current price $299.99
  • Original price $799.99 - Original price $799.99
    Original price
    $799.99
    $799.99 - $799.99
    Current price $799.99

    Explore Scientific 12mm 92° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
    More on the way

    This 2" 12mm 92° field Explore Scientific hyper-wide eyepiece provides an exceptionally immersive medium/medium high power observing experience. Yo...

    View full details
    Original price $799.99 - Original price $799.99
    Original price
    $799.99
    $799.99 - $799.99
    Current price $799.99
  • Original price $799.99 - Original price $799.99
    Original price
    $799.99
    $799.99 - $799.99
    Current price $799.99

    Explore Scientific 17mm 92° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
    More on the way

    You may be startled at the amazingly wide expanse of inky black sky that greets you when you first look into the 92° field of this Explore Scientif...

    View full details
    Original price $799.99 - Original price $799.99
    Original price
    $799.99
    $799.99 - $799.99
    Current price $799.99
  • Original price $289.99 - Original price $289.99
    Original price
    $289.99
    $289.99 - $289.99
    Current price $289.99

    Explore Scientific 40mm 62° 2" Waterproof Eyepiece

    Explore Scientific
    More on the way

    Explore Scientific Waterproof Eyepieces - Comfort, Quality, Value. The Explore Scientific 62° Series™ eyepieces are excellent flat-field multi-ele...

    View full details
    Original price $289.99 - Original price $289.99
    Original price
    $289.99
    $289.99 - $289.99
    Current price $289.99
  • Original price $794.01 - Original price $794.01
    Original price
    $794.01
    $794.01 - $794.01
    Current price $794.01

    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 ...

    View full details
    Original price $794.01 - Original price $794.01
    Original price
    $794.01
    $794.01 - $794.01
    Current price $794.01
  • Original price $228.01 - Original price $228.01
    Original price
    $228.01
    $228.01 - $228.01
    Current price $228.01

    TeleVue 2X Big Barlow for 2" Eyepieces, with 1.25" Eyepiece Adapter

    TeleVue
    In Stock

    This 2" 2x Clamp Ring Big Barlow can be used with any telescope using a 2" focuser. As it is only 4.5" long, it can also be used in most 2" star di...

    View full details
    Original price $228.01 - Original price $228.01
    Original price
    $228.01
    $228.01 - $228.01
    Current price $228.01
  • Original price $519.99 - Original price $519.99
    Original price
    $519.99
    $519.99 - $519.99
    Current price $519.99

    Explore Scientific 40mm 68° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
    In Stock

    If you have room in your observing kit for only one long focal length wide angle eyepiece, this Explore Scientific 40mm argon-purged eyepiece may w...

    View full details
    Original price $519.99 - Original price $519.99
    Original price
    $519.99
    $519.99 - $519.99
    Current price $519.99
  • Original price $579.99 - Original price $579.99
    Original price
    $579.99
    $579.99 - $579.99
    Current price $579.99

    Explore Scientific 9mm 100° Field Argon-Purged Waterproof 2" Eyepiece

    Explore Scientific
    In Stock

    The Explore Scientific 9mm argon-purged waterproof 2" eyepiece combines a high power capability with a 100° apparent field to provide a jaw-droppin...

    View full details
    Original price $579.99 - Original price $579.99
    Original price
    $579.99
    $579.99 - $579.99
    Current price $579.99
  • Original price $229.99 - Original price $229.99
    Original price
    $229.99
    $229.99 - $229.99
    Current price $229.99

    Explore Scientific 32mm 62° 2" Waterproof Eyepiece

    Explore Scientific
    More on the way

    Explore Scientific Waterproof Eyepieces - Comfort, Quality, Value. The Explore Scientific 62° Series™ eyepieces are excellent flat-field multi-elem...

    View full details
    Original price $229.99 - Original price $229.99
    Original price
    $229.99
    $229.99 - $229.99
    Current price $229.99

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare