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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 $299.00
    Original price $299.00 - Original price $299.00
    Original price $299.00
    Current price $269.00
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    Current price $269.00

    Pentax 10mm XW Extra Wide Angle Eyepiece

    Pentax
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    This short focal length Pentax is a high power eyepiece usable for both terrestrial and astronomical observing. Terrestrially, it is superb for det...

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    Original price $299.00
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    Original price $299.00
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    Original price $299.00
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    Current price $269.00

    Pentax 7mm XW Extra Wide Angle Eyepiece

    Pentax
    In Stock

    This wide field Pentax eyepiece is designed for high power observing of objects on the ground by day and in the skies at night. Terrestrially, it i...

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    Original price $299.00
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    Current price $269.00

    Pentax 5mm XW Extra Wide Angle Eyepiece

    Pentax
    In Stock

    This short focal length Pentax eyepiece has a very wide 70° field of view and very long 20mm eye relief, a uniquely useful combination not matched ...

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    Original price $299.00
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    Original price $299.00
    Current price $269.00
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    Original price $299.00
    Current price $269.00
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    Current price $269.00

    Pentax 3.5mm XW Extra Wide Angle Eyepiece

    Pentax
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    This very short focal length Pentax eyepiece has a wide 70° field of view combined with a long 20mm eye relief for eyeglass use. It's a combination...

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    Original price $299.00
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    Current price $269.00
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    Original price $299.00
    Current price $269.00
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    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
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    Original price $299.00
    Current price $269.00
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    Current price $269.00

    Pentax 14mm XW Extra Wide Angle Eyepiece

    Pentax
    In Stock

    This medium focal length Pentax is a dual-purpose eyepiece for both terrestrial and astronomical observing. Terrestrially, it is an excellent moder...

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    Original price $299.00
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  • Original price $399.00
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    Original price $399.00
    Current price $348.05
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    Current price $348.05

    Pentax 30mm XW Extra Wide Angle 2" Eyepiece

    Pentax
    In Stock

    This medium focal length 2" Pentax eyepiece is an excellent choice for medium power deep space observing with long focal length refractors, reflect...

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    Original price $399.00
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    Original price $399.00
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  • Original price $359.00 - Original price $359.00
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    Pentax 8-24mm SMC 1.25" Long Eye Relief Astronomical Zoom; 21-63x or 26-78x Spotting Scope Zoom

    Pentax
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    This is an ultra-premium six-element zoom eyepiece. It has a long eye relief that's particularly well-suited to those who must wear eyeglasses whil...

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    Original price $359.00 - Original price $359.00
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    $359.00
    $359.00 - $359.00
    Current price $359.00
  • Original price $429.00
    Original price $429.00 - Original price $429.00
    Original price $429.00
    Current price $378.05
    $378.05 - $378.05
    Current price $378.05

    Pentax 40mm XW Extra Wide Angle 2" Eyepiece

    Pentax
    In Stock

    This long focal length 2" Pentax eyepiece is outstanding for low power/wide field astronomical observing with long focal length refractors and cata...

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    Original price $429.00
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    Original price $429.00
    Current price $378.05
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  • Original price $499.95
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    Original price $499.95
    Current price $449.00
    $449.00 - $449.00
    Current price $449.00

    Pentax 23mm 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 $499.95
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    Original price $499.95
    Current price $449.00
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  • Original price $479.95
    Original price $479.95 - Original price $479.95
    Original price $479.95
    Current price $429.00
    $429.00 - $429.00
    Current price $429.00

    Pentax 16.5mm XW Extra Wide Angle Eyepiece

    Pentax
    In Stock

    This medium focal length Pentax is a dual-purpose eyepiece for both terrestrial and astronomical observing. Terrestrially, it is an excellent moder...

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    Original price $479.95
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    Original price $479.95
    Current price $429.00
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    Current price $429.00
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