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Eyepieces

The specifications of a telescope are NOT the only specs that matter. The other half of the equation is the specifications of the eyepiece. Telescope eyepieces are made in different models and sizes to accommodate different observing methods and celestial objects. For example, understanding the focal length of your optical tube divided by the focal length of your eyepiece will result in magnification, which in return can tell you whether it is more suitable for deep space low surface brightness observation or planetary/terrestrial high surface brightness observation. For example, if you wanted to observe an object such as the Andromeda Galaxy with a large apparent diameter, an eyepiece with a long focal length and large apparent field of view would excel over an eyepiece with a shorter focal length and small apparent field of view because it would be able to accommodate the size of the object at low magnification and high FOV while not getting dimmer images as you would with short focal lengths. If you plan on observing planets, a short focal length eyepiece with a small FOV will result in high magnification to observe details on the surface (eg. Great Red Spot). You'll get a dimmer image, but since planets are already bright as it is, this won't be an issue. - Note: Almost all eyepieces come in 2" or 1.25" barrel size forms.

 


Telescope Focal Length

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  1.  Explore Scientific - 9mm 120° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 2-inch O.D.

    Explore Scientific - 9mm 120° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 2-inch O.D.

    This 2” Explore Scientific 120° eyepiece is O-ring sealed and 100% waterproof. Internally sealing the eyepiece and purging it with inert, dry argon gas prevents ... Learn More
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    (48 States)
    Model#: EP12009-01
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $1,679.99

    Special Price: $999.99

  2. Baader Planetarium - 10mm Hyperion 68° Eyepiece

    Baader Planetarium - 10mm Hyperion 68° Eyepiece

    As a visual eyepiece, we have found the Hyperions deliver superb sharpness and color fidelity across their 68° wide, flat-field, even in fast telescopes. In our own comparisons to our personal favorites, the Pentax XL, the Hyperions matched the Pentax in every regard, and at just over 1/3 the price! From their superb on-axis and off-axis sharpness, to their pitch-black high contrast field, the Hyperions really work. Viewing through a Hyperion is notably comfortable and relaxing, due to their forgiving eye-position, 20mm of eye-relief, and an optical design that is free of the annoying kidney-bean effect.

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    Model#: HYP-10
    $139.00

  3. Baader Planetarium - 13mm Hyperion 68° Eyepiece

    Baader Planetarium - 13mm Hyperion 68° Eyepiece

    As a visual eyepiece, we have found the Hyperions deliver superb sharpness and color fidelity across their 68° wide, flat-field, even in fast telescopes. In our own comparisons to our personal favorites, the Pentax XL, the Hyperions matched the Pentax in every regard, and at just over 1/3 the price! From their superb on-axis and off-axis sharpness, to their pitch-black high contrast field, the Hyperions really work. Viewing through a Hyperion is notably comfortable and relaxing, due to their forgiving eye-position, 20mm of eye-relief, and an optical design that is free of the annoying kidney-bean effect.

    ...
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    Model#: HYP-13
    $139.00

  4. Baader Planetarium - 17mm Hyperion 68° Eyepiece

    Baader Planetarium - 17mm Hyperion 68° Eyepiece

    As a visual eyepiece, we have found the Hyperions deliver superb sharpness and color fidelity across their 68° wide, flat-field, even in fast telescopes. In our own comparisons to our personal favorites, the Pentax XL, the Hyperions matched the Pentax in every regard, and at just over 1/3 the price! From their superb on-axis and off-axis sharpness, to their pitch-black high contrast field, the Hyperions really work. Viewing through a Hyperion is notably comfortable and relaxing, due to their forgiving eye-position, 20mm of eye-relief, and an optical design that is free of the annoying kidney-bean effect.

    ...
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    Model#: HYP-17
    $139.00

  5. Baader Planetarium - 21mm Hyperion 68° Eyepiece

    Baader Planetarium - 21mm Hyperion 68° Eyepiece

    As a visual eyepiece, we have found the Hyperions deliver superb sharpness and color fidelity across their 68° wide, flat-field, even in fast telescopes. In our own comparisons to our personal favorites, the Pentax XL, the Hyperions matched the Pentax in every regard, and at just over 1/3 the price! From their superb on-axis and off-axis sharpness, to their pitch-black high contrast field, the Hyperions really work. Viewing through a Hyperion is notably comfortable and relaxing, due to their forgiving eye-position, 20mm of eye-relief, and an optical design that is free of the annoying kidney-bean effect.

    ...
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    Model#: HYP-21
    $139.00

  6. Baader Planetarium - 24mm Hyperion 68° Eyepiece

    Baader Planetarium - 24mm Hyperion 68° Eyepiece

    As a visual eyepiece, we have found the Hyperions deliver superb sharpness and color fidelity across their 68° wide, flat-field, even in fast telescopes. In our own comparisons to our personal favorites, the Pentax XL, the Hyperions matched the Pentax in every regard, and at just over 1/3 the price! From their superb on-axis and off-axis sharpness, to their pitch-black high contrast field, the Hyperions really work. Viewing through a Hyperion is notably comfortable and relaxing, due to their forgiving eye-position, 20mm of eye-relief, and an optical design that is free of the annoying kidney-bean effect.

    ...
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    Model#: HYP-24
    $139.00

  7. Baader Planetarium - 31mm Aspheric 2" Eyepiece

    Baader Planetarium - 31mm Aspheric 2" Eyepiece

    Baader Planetarium: 31mm Hyperion Aspheric Telescope EyepieceBaader has evolved the wide field astronomical eyepiece to a new level with the introduction of the Hyperion Aspherics ... Learn More
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    Model#: HYP-31
    $209.00

  8. HYP-5

    Baader Planetarium - 5mm Hyperion 68° Eyepiece

    As a visual eyepiece, we have found the Hyperions deliver superb sharpness and color fidelity across their 68° wide, flat-field, even in fast telescopes. In our own comparisons to our personal favorites, the Pentax XL, the Hyperions matched the Pentax in every regard, and at just over 1/3 the price! From their superb on-axis and off-axis sharpness, to their pitch-black high contrast field, the Hyperions really work. Viewing through a Hyperion is notably comfortable and relaxing, due to their forgiving eye-position, 20mm of eye-relief, and an optical design that is free of the annoying kidney-bean effect.

    ...
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    Model#: HYP-5
    $139.00

  9. Baader Planetarium - 8-24mm Hyperion ClickStop Zoom Mark III Eyepiece

    Baader Planetarium - 8-24mm Hyperion ClickStop Zoom Mark III Eyepiece

    The Baader Hyperion 8-24mm Clickstop Zoom continues the Hyperion tradition of delivering top-of-class performance and quality, at very reasonable prices

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    (48 States)
    Model#: HYP-ZOOM
    $289.00

  10. Baader Planetarium - 8mm Hyperion 68° Eyepiece

    Baader Planetarium - 8mm Hyperion 68° Eyepiece

    As a visual eyepiece, we have found the Hyperions deliver superb sharpness and color fidelity across their 68° wide, flat-field, even in fast telescopes. In our own comparisons to our personal favorites, the Pentax XL, the Hyperions matched the Pentax in every regard, and at just over 1/3 the price! From their superb on-axis and off-axis sharpness, to their pitch-black high contrast field, the Hyperions really work. Viewing through a Hyperion is notably comfortable and relaxing, due to their forgiving eye-position, 20mm of eye-relief, and an optical design that is free of the annoying kidney-bean effect.

    ...
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    Model#: HYP-8
    $139.00

  11. HYP-36

    Baader Planetarium - Aspheric 36mm, 2" eyepiece

    The Baader Hyperion-Aspherics are great for projection imaging, and are threaded to accept the full line of Hyperion Digital T-Rings for a robust direct attachment of almost any camera.

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    Model#: HYP-36
    $219.00

  12. Canadian Telescopes - 12.5mm Illuminated Plossl Eyepiece

    Canadian Telescopes - 12.5mm Illuminated Plossl Eyepiece

    Ideal for polar alignment and off-axis guiding.  The illuminated double cross lines makes it very easy to center objects.  The brightness is adjustable and the LED illuminated lines can be focused. 

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    Model#: CT24066
    $69.00

  13. Celestron - 10mm E-Lux Eyepiece - 1.25"

    Celestron - 10mm E-Lux Eyepiece - 1.25"

    The 10mm high power 1 1/4" E-Lux eyepiece is a 4-element Plssl with features that maximize it's performance at a very economical price.

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    Model#: 93301
    $34.95

  14. Celestron - 10mm Luminos Eyepiece - 1.25"

    Celestron - 10mm Luminos Eyepiece - 1.25"

    82 degree Field - Wide FOV for high and low magnifications. Retractible eyecups - Ultra-low profile for eyeglass wearersParfocal eyepiece - Little or no focusing is needed when changing from low to high power

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    Model#: 93431
    $139.95

  15. Celestron - 10mm Plossl Reticle Eyepiece

    Celestron - 10mm Plossl Reticle Eyepiece

    This type of reticle pattern allows you to position the guide star in the middle square or at the intersection of two lines, whichever is easier for you. An optional illuminator (60011) is required.

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    Model#: 94169
    $95.95

  16. Celestron - 10mm X-Cel Eyepiece - 1.25"

    Celestron - 10mm X-Cel Eyepiece - 1.25"

    The 10mm high power X-Cel eyepiece is a 6-element fully multi-coated optical design, the X-Cel utilizes extra low dispersion (ED) glass on its most highly curved surfaces, to minimize chromatic aberration that can hinder sharp planetary views.

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    Model#: 93389
    $63.95

  17. 94171
  18. Celestron - 12.5mm X-Cel Eyepiece - 1.25"

    Celestron - 12.5mm X-Cel Eyepiece - 1.25"

    Every X-Cel eyepiece is parfocal with each other, meaning little or no focusing is needed when changing from low to high power. The X-Cel comes with soft rubber eyecups and a durable plastic case. In addition, if you are an eyeglass wearer, you will enjoy the 20mm eye relief available on each of the X-Cel focal lengths.

    ...
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    Model#: 93390
    $63.95

  19. Celestron - 12mm Omni Eyepiece - 1.25"

    Celestron - 12mm Omni Eyepiece - 1.25"

    The 12.5mm medium power Omni eyepiece is a 4 -element premium symmetrical Plossl optical design. Features include blackened lens edges to minimize internal reflection and maximize contrast, multi-layer coating group on each lens surface to maximize light transmission and contrast, and each Omni goes through a two-step anodizing process to prevent reflection from the top eyepiece barrel, unlike most other manufactures who use reflective surfaces.

    ...
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    Model#: 93319
    $39.95

  20. 93424

    Celestron - 12mm X-Cel LX Eyepiece - 1.25"

    X-Cel LX 12 mm Eyepiece - General FeaturesWide field of view enhances views of the night sky through a single lens6-element fully multi-coated optics create sharper images Extendable twist-up eyepieces are easier and more comfortable, especially for

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    Model#: 93424
    $74.95

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