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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 12mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
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    This Astro-Tech 12mm Paradigm Dual ED medium power eyepiece has outstanding performance at a price that will make you wonder why other good quality...

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  • 24mm illuminated reticle eyepiece
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    Astro-Tech 24mm Illuminated Reticle Eyepiece

    Astro-Tech
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    The economical Astro-Tech #AT24IL illuminated reticle 1.25" eyepiece helps you align your go-to telescope on the sky, check your polar alignment fo...

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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 8mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
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    This Astro-Tech 8mm Paradigm Dual ED eyepiece is a logical choice for high quality/high magnification observing with long focal length refractors, ...

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  • $119.95 - $119.95
    $119.95
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    $119.95

    Astro-Tech 7mm UWA 82° 1.25" Eyepiece

    Astro-Tech
    In Stock

    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 4mm UWA 82° 1.25" Eyepiece

    Astro-Tech
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    Four millimeters is the extreme end of useful magnification in a 1.25" eyepiece — the one you reach for when the atmosphere is dead calm and the pl...

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    Astro-Tech 10mm UWA 82° 1.25" Eyepiece

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    Ten millimeters splits the difference between deep-sky and planetary magnification — high enough to resolve globular clusters and show structure in...

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    Astro-Tech 13mm UWA 82° 1.25" Eyepiece

    Astro-Tech
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    The 13mm is the transition point — high enough magnification to show real detail in globular clusters and planetary nebulae, low enough to hold a u...

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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 15mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
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    This Astro-Tech 15mm Paradigm Dual ED eyepiece gives you the outstanding medium power performance of a high-priced eyepiece at a price that will ma...

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  • $119.95 - $119.95
    $119.95
    $119.95 - $119.95
    $119.95

    Astro-Tech 16mm UWA 82° 1.25" Eyepiece

    Astro-Tech
    In Stock

    Sixteen millimeters is the all-rounder focal length in a 1.25" barrel. In a 10-inch f/5 Dob, it gives you 78x — high enough to darken the sky backg...

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  • $69.95 - $69.95
    $69.95
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    $69.95

    Astro-Tech 3.2mm 1.25" Paradigm Dual ED Eyepiece

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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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    $69.95
    $69.95 - $69.95
    $69.95

    Astro-Tech 18mm 1.25" Paradigm Dual ED Eyepiece

    Astro-Tech
    In Stock

    This Astro-Tech 18mm Paradigm Dual ED is an excellent medium to medium low power eyepiece for lunar observing, encompassing globular clusters, pick...

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    $69.95
  • 24mm 68° field argon-purged waterproof 1.25" eyepiece
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    $269.99
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    $269.99
    $109.00
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    $109.00

    Explore Scientific 24mm 68° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
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    This Explore Scientific 24mm argon-purged eyepiece has a wide 68° field that gives impressively sharp and contrasty medium power images with virtua...

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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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  • 11mm 82° field argon-purged waterproof 1.25" eyepiece
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    $139.00
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    $139.00

    Explore Scientific 11mm 82° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
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    The "picture window on space" viewing experience of this 82° field Explore Scientific 11mm 1.25" argon-purged eyepiece gives you the magnification ...

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    $139.00
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  • $40.00 - $40.00
    $40.00
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    $40.00

    Astro-Tech 5.5mm 1.25" PF Eyepiece

    Astro-Tech
    In Stock

    This Astro-Tech 5.5mm PF series eyepiece has excellent eyerelief and a fantastic flat field to further enhance your viewing pleasure. This Astro-Te...

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    Astro-Tech 10.5mm 1.25" PF Eyepiece

    Astro-Tech
    In Stock

    This Astro-Tech 10.5mm PF series eyepiece has excellent eyerelief and a fantastic flat field to further enhance your viewing pleasure. This Astro-T...

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  • $59.95 - $59.95
    $59.95
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    $59.95

    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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    $59.95
  • $40.00 - $40.00
    $40.00
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    $40.00

    Astro-Tech 15.5mm 1.25" PF Eyepiece

    Astro-Tech
    In Stock

    This Astro-Tech 15.5mm PF series eyepiece has excellent eyerelief and a fantastic flat field to further enhance your viewing pleasure. This Astro-T...

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    $40.00 - $40.00
    $40.00
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    $40.00
  • $399.00 - $399.00
    $399.00
    $399.00 - $399.00
    $399.00

    TeleVue 24mm Panoptic Eyepiece

    TeleVue
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    This is one of the most popular premium-quality 1.25" low to medium power wide field eyepieces. An ED glass element provides high contrast for obse...

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    $399.00 - $399.00
    $399.00
    $399.00 - $399.00
    $399.00
  • $40.00 - $40.00
    $40.00
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    Astro-Tech 19mm 1.25" PF Eyepiece

    Astro-Tech
    In Stock

    The Astro-Tech 19mm Premium Flat Field keeps the field wide at 65°, and delivers 20mm of eye relief that works even if you wear glasses. It's not a...

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    $40.00 - $40.00
    $40.00
  • 16mm 68° field argon-purged waterproof 1.25" eyepiece
    Save $110.99 Save $0.00
    $219.99
    $219.99 - $219.99
    $219.99
    $109.00
    $109.00 - $109.00
    $109.00

    Explore Scientific 16mm 68° Field Argon-Purged Waterproof 1.25" Eyepiece

    Explore Scientific
    More on the way

    This Explore Scientific 16mm argon-purged eyepiece is a truly fine medium power eyepiece with a substantial 68° field of view that can provide a co...

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    $219.99
    $219.99 - $219.99
    $219.99
    $109.00
    $109.00 - $109.00
    $109.00
    Save $110.99 Save $0.00
  • $176.00 - $176.00
    $176.00
    $176.00 - $176.00
    $176.00

    TeleVue 32mm Plössl Eyepiece

    TeleVue
    In Stock

    This is a very good low power/wide field eyepiece for capturing galaxy pairs and galaxy clusters, viewing emission and reflection nebulas in their ...

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    $176.00 - $176.00
    $176.00
    $176.00 - $176.00
    $176.00

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