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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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  • Original price $0.00 - Original price $0.00
    Original price $0.00
    $299.95
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    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...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $299.95
    $299.95 - $299.95
    Current price $299.95
  • Original price $894.00 - Original price $894.00
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    $894.00
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    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"...

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    Original price $894.00 - Original price $894.00
    Original price
    $894.00
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    Current price $894.00
  • Original price $219.99 - Original price $219.99
    Original price
    $219.99
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    Current price $219.99

    Explore Scientific 20mm 68° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
    More on the way

    This Explore Scientific 20mm argon-purged waterproof eyepiece is a fine medium power 1.25" eyepiece whose substantial 68° field of view gives you "...

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    Original price $219.99 - Original price $219.99
    Original price
    $219.99
    $219.99 - $219.99
    Current price $219.99
  • Original price $299.00
    Original price $299.00 - Original price $299.00
    Original price $299.00
    Current price $269.00
    $269.00 - $269.00
    Current price $269.00

    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 ...

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    Original price $299.00
    Original price $299.00 - Original price $299.00
    Original price $299.00
    Current price $269.00
    $269.00 - $269.00
    Current price $269.00
    Save $30.00 Save $0.00
  • Original price $121.01 - Original price $121.01
    Original price
    $121.01
    $121.01 - $121.01
    Current price $121.01

    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...

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    Original price $121.01 - Original price $121.01
    Original price
    $121.01
    $121.01 - $121.01
    Current price $121.01
  • Original price $149.99 - Original price $149.99
    Original price
    $149.99
    $149.99 - $149.99
    Current price $149.99

    Explore Scientific 62° 20mm 1.25" Waterproof Eyepiece

    Explore Scientific
    In Stock

    Explore Scientific Waterproof Eyepieces - Comfort, Quality, Value.  Explore Scientific Waterproof Eyepieces - Comfort, Quality, Value. The Explore ...

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    Original price $149.99 - Original price $149.99
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    $149.99
    $149.99 - $149.99
    Current price $149.99
  • Original price $799.99 - Original price $799.99
    Original price
    $799.99
    $799.99 - $799.99
    Current price $799.99

    Explore Scientific 20mm 100° field waterproof 2" eyepiece

    Explore Scientific
    More on the way

    The 100° apparent field of the Explore Scientific 20mm waterproof 2" eyepiece provides superb maximum field/medium power observing in all scopes, f...

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    Original price $799.99 - Original price $799.99
    Original price
    $799.99
    $799.99 - $799.99
    Current price $799.99
  • Original price $119.99 - Original price $119.99
    Original price
    $119.99
    $119.99 - $119.99
    Current price $119.99

    Explore Scientific 20mm 52° Series Waterproof Eyepiece

    Explore Scientific
    More on the way

    Looking for something out of the ordinary for your next eyepiece?  The Explore Scientific 52° series is a strong contender for necessary addition t...

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    Original price $119.99 - Original price $119.99
    Original price
    $119.99
    $119.99 - $119.99
    Current price $119.99

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