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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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  • 3X Barlow for 1.25" eyepieces
    $209.99 - $209.99
    $209.99
    $209.99 - $209.99
    $209.99

    Explore Scientific 3X Barlow for 1.25" eyepieces

    Explore Scientific
    More on the way

    This new four-element 1.25" 3x Explore Scientific focal extender (Barlow lens) triples the power of any eyepiece used with it, with flat-field and ...

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    $209.99 - $209.99
    $209.99
    $209.99 - $209.99
    $209.99
  • 2X Barlow for 2" eyepieces, with 1.25" adapter
    $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $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...

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    $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $299.99
  • 12mm 92° field argon-purged waterproof 2" eyepiece
    $799.99 - $799.99
    $799.99
    $799.99 - $799.99
    $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...

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    $799.99 - $799.99
    $799.99
    $799.99 - $799.99
    $799.99
  • 16mm 68° field argon-purged waterproof 1.25" eyepiece
    Save $50.05 Save $0.00
    $219.99
    $219.99 - $219.99
    $219.99
    $169.94
    $169.94 - $169.94
    $169.94

    Explore Scientific 16mm 68° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
    In Stock

    This Explore Scientific 16mm argon-purged eyepiece is a truly fine medium power eyepiece with a substantial 68° field of view that can provide a co...

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    $219.99
    $219.99 - $219.99
    $219.99
    $169.94
    $169.94 - $169.94
    $169.94
    Save $50.05 Save $0.00
  • 4.5mm 1.25" 72° field Delos
    $386.01 - $386.01
    $386.01
    $386.01 - $386.01
    $386.01

    TeleVue 4.5mm 1.25" 72° Field Delos Eyepiece

    TeleVue
    More on the way

    The 4.5mm TeleVue Delos combines high image quality and high power with a long 20mm eye relief that makes it ideal for eyeglass wearers. The majori...

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    $386.01 - $386.01
    $386.01
    $386.01 - $386.01
    $386.01
  • $658.00 - $658.00
    $658.00
    $658.00 - $658.00
    $658.00

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

    TeleVue
    In Stock

    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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    $658.00 - $658.00
    $658.00
    $658.00 - $658.00
    $658.00
  • $229.00 - $229.00
    $229.00
    $229.00 - $229.00
    $229.00

    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...

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    $229.00 - $229.00
    $229.00
    $229.00 - $229.00
    $229.00
  • Explore Scientific 62° 9mm 1.25" Waterproof Eyepiece
    Save $40.05 Save $0.00
    $149.99
    $149.99 - $149.99
    $149.99
    $109.94
    $109.94 - $109.94
    $109.94

    Explore Scientific 9mm 62° 1.25" 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...

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    $149.99
    $149.99 - $149.99
    $149.99
    $109.94
    $109.94 - $109.94
    $109.94
    Save $40.05 Save $0.00
  • 17mm 92° field argon-purged waterproof 2" eyepiece
    $799.99 - $799.99
    $799.99
    $799.99 - $799.99
    $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...

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    $799.99 - $799.99
    $799.99
    $799.99 - $799.99
    $799.99
  • 14mm 1.25" 72° field Delos
    $386.01 - $386.01
    $386.01
    $386.01 - $386.01
    $386.01

    TeleVue 14mm 1.25" 72° Field Delos Eyepiece

    TeleVue
    In Stock

    The 14mm TeleVue Delos puts the optical virtues of a TeleVue Ethos eyepiece - high contrast, a neutral color balance, and full field sharpness - in...

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    $386.01 - $386.01
    $386.01
    $386.01 - $386.01
    $386.01
  • 7mm X-Cel LX Series 1.25"
    $99.95 - $99.95
    $99.95
    $99.95 - $99.95
    $99.95

    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...

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    $99.95 - $99.95
    $99.95
    $99.95 - $99.95
    $99.95
  • 18mm X-Cel LX Series 1.25"
    $99.95 - $99.95
    $99.95
    $99.95 - $99.95
    $99.95

    Celestron 18mm X-Cel LX Series 1.25" Eyepiece

    Celestron
    In Stock

    This Celestron X-Cel LX 18mm eyepiece uses a new six-element fully-multicoated optical system to provide a wide 60° field of view. This medium foca...

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    $99.95 - $99.95
    $99.95
    $99.95 - $99.95
    $99.95
  • 7.2mm to 21.5mm zoom
    $238.00 - $238.00
    $238.00
    $238.00 - $238.00
    $238.00

    Lunt 7.2mm to 21.5mm zoom

    Lunt Solar Systems
    More on the way

    The 7.2mm to 21.5mm focal length range of this Lunt Solar zoom eyepiece has been chosen specifically to complement the focal lengths of the various...

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    $238.00 - $238.00
    $238.00
    $238.00 - $238.00
    $238.00
  • Kit of 2" eyepieces and visual accessories
    $0.00 - $0.00
    $0.00
    $399.95
    $399.95 - $399.95
    $399.95

    Celestron Kit of 2" Eyepieces and Visual Accessories 94305

    Celestron
    In Stock

    This kit consists of eleven Celestron 2" visual accessories that will get you started observing right with your new Celestron telescope - or any br...

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    $0.00 - $0.00
    $0.00
    $399.95
    $399.95 - $399.95
    $399.95
  • Explore Scientific 62° 40mm 2" Waterproof Eyepiece
    $289.99 - $289.99
    $289.99
    $289.99 - $289.99
    $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...

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    $289.99 - $289.99
    $289.99
    $289.99 - $289.99
    $289.99
  • $794.01 - $794.01
    $794.01
    $794.01 - $794.01
    $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 ...

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    $794.01 - $794.01
    $794.01
    $794.01 - $794.01
    $794.01
  • $335.00 - $335.00
    $335.00
    $335.00 - $335.00
    $335.00

    TeleVue 3.5mm Nagler Type 6 Eyepiece

    TeleVue
    More on the way

    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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    $335.00 - $335.00
    $335.00
    $335.00 - $335.00
    $335.00
  • $134.00 - $134.00
    $134.00
    $134.00 - $134.00
    $134.00

    TeleVue 3X Barlow for 1.25" Eyepieces

    TeleVue
    More on the way

    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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    $134.00 - $134.00
    $134.00
    $134.00 - $134.00
    $134.00
  • $335.00 - $335.00
    $335.00
    $335.00 - $335.00
    $335.00

    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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    $335.00 - $335.00
    $335.00
    $335.00 - $335.00
    $335.00
  • $129.95 - $129.95
    $129.95
    $129.95 - $129.95
    $129.95

    Celestron 7mm 1.25" 82º Luminos Eyepiece

    Celestron
    In Stock

    This sharp 7mm Celestron Luminos eyepiece has a wide and flat 82° field of view for "picture window" views, even at very high powers . This excepti...

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    $129.95 - $129.95
    $129.95
    $129.95 - $129.95
    $129.95
  • $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $299.99

    Explore Scientific 2" 3x Focal Extender (Barlow)

    Explore Scientific
    More on the way

    The 2" 3x Explore Scientific premium Barlow (described by Explore Scientific as a focal extender, rather than a Barlow) uses an advanced four-eleme...

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    $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $299.99
  • $101.00 - $101.00
    $101.00
    $101.00 - $101.00
    $101.00

    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...

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    $101.00 - $101.00
    $101.00
    $101.00 - $101.00
    $101.00
  • $335.00 - $335.00
    $335.00
    $335.00 - $335.00
    $335.00

    TeleVue 7mm Nagler Type 6 Eyepiece

    TeleVue
    More on the way

    This is a superb short focal length ultra wide field eyepiece designed as an upgrade to the original and highly-prized 7mm Nagler. Due to the signi...

    View full details
    $335.00 - $335.00
    $335.00
    $335.00 - $335.00
    $335.00
  • $59.95 - $59.95
    $59.95
    $59.95 - $59.95
    $59.95

    Astro-Tech 2X Telecentric Extender Barlow for 1.25" Eyepieces

    Astro-Tech
    In Stock

    This Astro-Tech 2x Telecentric Extender, ie a Barlow, is a great way to cleanly double the power of any 1.25" eyepiece in your collection . . . The...

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    $59.95 - $59.95
    $59.95
    $59.95 - $59.95
    $59.95

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