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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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    Astro-Tech 5mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
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    This Astro-Tech 5mm Paradigm Dual ED eyepiece is excellent for medium to medium high magnification viewing with short to medium focal length refrac...

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    Astro-Tech 7mm UWA 82° 1.25" Eyepiece

    Astro-Tech
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    Seven millimeters is the high-power eyepiece in a 1.25" barrel — the one that turns a 10-inch Dob into a planet machine. At 179x, Jupiter shows clo...

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    Astro-Tech 25mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
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    This Astro-Tech 25mm Paradigm Dual ED is an excellent medium to low power eyepiece for encompassing open clusters, picking up detail in emission an...

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    Astro-Tech 3.2mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
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    This Astro-Tech 3.2mm Paradigm Dual ED eyepiece is excellent for medium high to high power magnification viewing with short to medium focal length ...

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    Astro-Tech 7mm 100° Field Waterproof 1.25"/2" Eyepiece

    Astro-Tech
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    At 7mm, you're pushing into serious magnification territory. In a 10-inch f/5 Dobsonian, the 7mm XWA delivers 179x — high enough to resolve fine pl...

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    Astro-Tech 25mm 1.25" PF Eyepiece

    Astro-Tech
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    The 32mm Plössl that came with your telescope served you well. You learned the sky with it. But somewhere along the way you noticed: the field is n...

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

    Astro-Tech
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    You have five eyepieces in a case and you need ten focal lengths. The obvious answer is a Barlow — double the power of every eyepiece you own in on...

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  • 8.8mm 82° field argon-purged waterproof 1.25" eyepiece
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    $229.99 - $229.99
    $229.99
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    Explore Scientific 8.8mm 82° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
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    This Product Has Been Discontinued And This Is Here for Informational Purposes Only. It Is No Longer For  Sale. This 8.8mm Explore Scientific 82° f...

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    Explore Scientific 4.7mm 82° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
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    This Product Has Been Discontinued And This Is Here for Informational Purposes Only. It Is No Longer For  Sale. This 4.7mm Explore Scientific 82° f...

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  • 6.7mm 82° field argon-purged waterproof 1.25" eyepiece
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    $229.99 - $229.99
    $229.99
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    $229.99

    Explore Scientific 6.7mm 82° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
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    This Product Has Been Discontinued And This Is Here for Informational Purposes Only. It Is No Longer For  Sale. This high power 6.7mm Explore Scien...

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  • Sky Rover UF 24 mm Ultra Flat Field Eyepiece with 65° wide field, long eye relief, and 1.25" barrel
    Sky Rover UF 24 mm Ultra Flat Field Eyepiece with 65° wide field, long eye relief, and 1.25" barrel
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    $189.00
    $189.00 - $189.00
    $189.00
    $160.65
    $160.65 - $160.65
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    Sky Rover UF 24 mm Ultra Flat Field Eyepiece – 65° Wide Field, 1.25" Barrel NEAF DEMO

    Sky Rover
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    Bright fields and comfortable eye positioning. That's all most observers ask for at low power. The 24mm focal length is where eyepieces finally get...

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    $34.00

    Sky Rover 5.5mm Premium Flat Field Eyepiece NEAF DEMO

    Sky Rover
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    High-power eyepieces used to mean a choice: pay for premium glass, or squint through a design that sacrifices edge quality for a low price. The Sky...

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    Sky Rover XWA 3.5mm 110° Ultra Wide Angle Eyepiece NEAF DEMO

    Sky Rover
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    A 3.5mm eyepiece is a specialist. It's the one you reach for when the atmosphere goes still — when stars stop shimmering, when planetary detail sna...

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