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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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  • 13mm 1.25"/2" 100° field Ethos
    $693.00 - $693.00
    $693.00
    $693.00 - $693.00
    $693.00

    TeleVue 13mm 1.25"/2" 100° Field Ethos

    TeleVue
    In Stock

    The 100° apparent field of this new TeleVue 13mm Ethos eyepiece provides a field area more than 50% larger than the "space-walking" 82° field of a ...

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    $693.00 - $693.00
    $693.00
    $693.00 - $693.00
    $693.00
  • $941.00 - $941.00
    $941.00
    $941.00 - $941.00
    $941.00

    TeleVue 21mm 2" 100° Field Ethos Eyepiece

    TeleVue
    In Stock

    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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    $941.00 - $941.00
    $941.00
    $941.00 - $941.00
    $941.00
  • $651.00 - $651.00
    $651.00
    $651.00 - $651.00
    $651.00

    TeleVue 8mm 1.25"/2" 100° Field Ethos Eyepiece

    TeleVue
    In Stock

    The TeleVue 8mm Ethos eyepiece raises the bar for shorter focal length eyepieces. It expands the apparent field of view to an astonishing 100°, whi...

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    $651.00 - $651.00
    $651.00
    $651.00 - $651.00
    $651.00
  • $651.00 - $651.00
    $651.00
    $651.00 - $651.00
    $651.00

    TeleVue 6mm 1.25"/2" 100° Field Ethos Eyepiece

    TeleVue
    More on the way

    Just like the 8mm TeleVue Ethos before it, the TeleVue 6mm Ethos eyepiece once again raises the bar for shorter focal length eyepieces. It expands ...

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    $651.00 - $651.00
    $651.00
    $651.00 - $651.00
    $651.00
  • $693.00 - $693.00
    $693.00
    $693.00 - $693.00
    $693.00

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

    TeleVue
    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 ...

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

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

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