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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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  • 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
  • Save $80.00 Save $0.00
    $179.99
    $179.99 - $179.99
    $179.99
    $99.99
    $99.99 - $99.99
    $99.99

    Explore Scientific 40mm 52° Series Waterproof Eyepiece

    Explore Scientific
    In Stock

    Explore Scientific 40mm 52° Eyepiece – Ultra-Comfortable Viewing with Exceptional Contrast If you’re looking for an eyepiece that delivers generous...

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    $179.99
    $179.99 - $179.99
    $179.99
    $99.99
    $99.99 - $99.99
    $99.99
    Save $80.00 Save $0.00
  • Explore Scientific 62° 40mm 2" Waterproof Eyepiece
    Save $90.00 Save $0.00
    $289.99
    $289.99 - $289.99
    $289.99
    $199.99
    $199.99 - $199.99
    $199.99

    Explore Scientific 40mm 62° 2" Waterproof Eyepiece

    Explore Scientific
    More on the way

    Explore Scientific 40mm 62° 2" Waterproof Eyepiece The Explore Scientific 40mm 62° Series 2" Eyepiece is a superb choice for deep-sky observers and...

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    $289.99
    $289.99 - $289.99
    $289.99
    $199.99
    $199.99 - $199.99
    $199.99
    Save $90.00 Save $0.00
  • 4.5mm 1.25" 72° field Delos
    $407.00 - $407.00
    $407.00
    $407.00 - $407.00
    $407.00

    TeleVue 4.5mm 1.25" 72° Field Delos Eyepiece

    TeleVue
    In Stock

    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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    $407.00 - $407.00
    $407.00
    $407.00 - $407.00
    $407.00
  • 40mm 68° field argon-purged waterproof 2" eyepiece
    Save $120.00 Save $0.00
    $519.99
    $519.99 - $519.99
    $519.99
    $399.99
    $399.99 - $399.99
    $399.99

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

    Explore Scientific
    More on the way

    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...

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    $519.99
    $519.99 - $519.99
    $519.99
    $399.99
    $399.99 - $399.99
    $399.99
    Save $120.00 Save $0.00
  • 14mm 1.25" 72° field Delos
    $407.00 - $407.00
    $407.00
    $407.00 - $407.00
    $407.00

    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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    $407.00 - $407.00
    $407.00
    $407.00 - $407.00
    $407.00
  • $354.00 - $354.00
    $354.00
    $354.00 - $354.00
    $354.00

    TeleVue 7mm Nagler Type 6 Eyepiece

    TeleVue
    In Stock

    This is a superb short focal length ultra wide field eyepiece designed as an upgrade to the original and highly-prized 7mm Nagler. This 1.25" eyepi...

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    $354.00 - $354.00
    $354.00
    $354.00 - $354.00
    $354.00
  • $241.00 - $241.00
    $241.00
    $241.00 - $241.00
    $241.00

    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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    $241.00 - $241.00
    $241.00
    $241.00 - $241.00
    $241.00
  • $31.95 - $31.95
    $31.95
    $31.95 - $31.95
    $31.95

    Celestron Omni 6mm 1.25" Plossl Eyepiece 93317

    Celestron
    In Stock

    This is a good quality fully-multicoated high power eyepiece at a good low price. It's designed for high magnification lunar and planetary observin...

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    $31.95 - $31.95
    $31.95
    $31.95 - $31.95
    $31.95
  • $69.95 - $69.95
    $69.95
    $69.95 - $69.95
    $69.95

    Celestron 2X Barlow for 1.25" Eyepieces (Includes T-Adapter)

    Celestron
    More on the way

    This 1.25" 2x achromatic Barlow lens can be used visually, but the eyepiece holder portion also has integral T-threads so it can be used as a T-ada...

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    $69.95 - $69.95
    $69.95
    $69.95 - $69.95
    $69.95
  • 18mm X-Cel LX Series 1.25"
    $109.95 - $109.95
    $109.95
    $109.95 - $109.95
    $109.95

    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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    $109.95 - $109.95
    $109.95
    $109.95 - $109.95
    $109.95
  • 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
    In Stock

    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
  • 3.5mm 1.25" 72° field Delos
    $407.00 - $407.00
    $407.00
    $407.00 - $407.00
    $407.00

    TeleVue 3.5mm 1.25" 72° Field Delos Eyepiece

    TeleVue
    In Stock

    The 3.5mm TeleVue Delos is designed to produce very high power/high contrast/high quality images with any telescope. It has a long 20mm eye relief ...

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    $407.00 - $407.00
    $407.00
    $407.00 - $407.00
    $407.00
  • Kit of 2" eyepieces and visual accessories
    $0.00 - $0.00
    $0.00
    $419.95
    $419.95 - $419.95
    $419.95

    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
    $419.95
    $419.95 - $419.95
    $419.95
  • 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
  • $52.95 - $52.95
    $52.95
    $52.95 - $52.95
    $52.95

    Celestron Omni 40mm 1.25" Plossl Eyepiece

    Celestron
    In Stock

    This is an economical good quality low power eyepiece with fully-multicoated optics. With a 43 degree field of view it has the widest field possibl...

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    $52.95 - $52.95
    $52.95
    $52.95 - $52.95
    $52.95
  • High hat adapter to use 1.25" eyepieces in 2" focusers, matte satin finish
    $69.00 - $69.00
    $69.00
    $69.00 - $69.00
    $69.00

    TeleVue High Hat Adapter to Use 1.25" Eyepieces in 2" Focusers, Matte Satin Finish

    TeleVue
    In Stock

    This high hat step-down adapter allows the use of 1.25" eyepieces in 2" focuser drawtubes and 2" star diagonals. The body of the adapter has a non-...

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    $69.00 - $69.00
    $69.00
    $69.00 - $69.00
    $69.00
  • 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
    In Stock

    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
  • $31.95 - $31.95
    $31.95
    $31.95 - $31.95
    $31.95

    Celestron Omni 4mm 1.25" Plossl Eyepiece 93316

    Celestron
    More on the way

    This fully-multicoated eyepiece is one of the shortest focal length and most economically-priced Plössl eyepieces available. It's designed for very...

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    $31.95 - $31.95
    $31.95
    $31.95 - $31.95
    $31.95
  • $139.95 - $139.95
    $139.95
    $139.95 - $139.95
    $139.95

    Celestron 7mm 1.25" 82º Luminos Eyepiece

    Celestron
    More on the way

    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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    $139.95 - $139.95
    $139.95
    $139.95 - $139.95
    $139.95
  • Explore Scientific 2-inch 3x focal extender with 1.25-inch adapter for telescope eyepieces
    Explore Scientific 2-inch 3x focal extender Barlow lens in black anodized aluminum housing
    $299.99 - $299.99
    $299.99
    $299.99 - $299.99
    $299.99

    Explore Scientific 2" 3x Focal Extender (Barlow)

    Explore Scientific
    In Stock

    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
  • $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
  • Explore Scientific 62° 32mm 2" Waterproof Eyepiece
    Save $80.00 Save $0.00
    $229.99
    $229.99 - $229.99
    $229.99
    $149.99
    $149.99 - $149.99
    $149.99

    Explore Scientific 32mm 62° 2" Waterproof Eyepiece

    Explore Scientific
    In Stock

    Explore Scientific 32mm 62° 2" Waterproof Eyepiece If you're aiming to take full advantage of your telescope's 2" focuser for wide-field, low-power...

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    $229.99
    $229.99 - $229.99
    $229.99
    $149.99
    $149.99 - $149.99
    $149.99
    Save $80.00 Save $0.00
  • $31.95 - $31.95
    $31.95
    $31.95 - $31.95
    $31.95

    Celestron Omni 15mm 1.25" Plossl Eyepiece 93320

    Celestron
    More on the way

     This is a good quality medium power fully-multicoated eyepiece at a very economical price for the astronomer on a budget. It's designed for lunar ...

    View full details
    $31.95 - $31.95
    $31.95
    $31.95 - $31.95
    $31.95

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