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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 - Wide Field 82° 24mm Eyepiece - 2" Barrel Size

    Explore Scientific - Wide Field 82° 24mm Eyepiece - 2" Barrel Size

    Using advanced computer design, combinations of low dispersion and high refractive index optical glasses, and durable multilayer deposition coatings, Explore Scientific 82° Series extreme wide field eyepieces are optimized to produce high contrast, high resolution, and superior flat field characteristics.

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    Model#: EP8224-00
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $249.00

    Special Price: $180.00

  2. Explore Scientific -11mm 82° Series Nitrogen-Purged Waterproof Eyepiece; Fully Multi-Coated; 1.25-inch O.D.

    Explore Scientific -11mm 82° Series Nitrogen-Purged Waterproof Eyepiece; Fully Multi-Coated; 1.25-inch O.D.

    11mm 82° Series Nitrogen-Purged Waterproof Eyepiece; Fully Multi-Coated; 1.25-inch O.D.

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    Model#: EPWP8211-00
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $169.99

    Special Price: $99.99

  3. iOptron - iE1300 Electronic Eyepiece

    iOptron - iE1300 Electronic Eyepiece

    With the iOptron iE3000 Electronic Eyepiece you can experience astro-video and astrophotography for yourself!

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    Model#: 8429
    $149.00

  4. iOptron - iE3000 Electronic Eyepiece

    iOptron - iE3000 Electronic Eyepiece

    With the iOptron iE3000 Electronic Eyepiece you can experience astro-video and astrophotography for yourself!

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    Model#: 8430
    $198.00

  5. Levenhuk - 12mm Ra ER20 WA Eyepiece

    Levenhuk - 12mm Ra ER20 WA Eyepiece

    Levenhuk Ra ER20 WA 12 mm is a very practical wide-angle eyepiece. It has a focal length of 12 mm and a field of view of 68°. This eyepiece boasts a 20-mm eye relief that provides for maximum comfort during observations if you are wearing glasses.

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    (48 States)
    Model#: 35007
    $289.95

  6. Levenhuk - 14.5 mm Ra ER20 WA Eyepiece

    Levenhuk - 14.5 mm Ra ER20 WA Eyepiece

    Levenhuk Ra ER20 WA 14.5 mm is a wide-angle eyepiece with a 14.5-mm focal length. The 20-mm eye relief provides for comfortable observations when wearing glasses. This eyepiece has a field of view of 68°.

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    Model#: 35008
    $289.95

  7. Levenhuk - 18mm Ra ER20 WA Eyepiece

    Levenhuk - 18mm Ra ER20 WA Eyepiece

    Levenhuk Ra ER20 WA 18 mm is a wide-angle eyepiece that performs well during any visual observations. If you wear glasses, you are sure to appreciate the 20-mm eye relief of this model.

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    (48 States)
    Model#: 35009
    $289.95

  8. Levenhuk - 35mm Ra 2" ED Eyepiece

    Levenhuk - 35mm Ra 2" ED Eyepiece

    Levenhuk Ra 35 mm 2" ED is a practical parfocal eyepiece with a long focal length. The optical elements are made of ED glass and are fully multi-coated, yielding, as a result, sharp and bright views of observed objects.

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    (48 States)
    Model#: 35429
    $219.95

  9. Levenhuk - 3mm Ra LER Eyepiece

    Levenhuk - 3mm Ra LER Eyepiece

    Levenhuk Ra LER 3 mm is a practical eyepiece with a short focal length of 3 mm (0.1 in) and a long eye relief for maximum comfort during observations. This model performs best during planetary observations.

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    Model#: 35010
    $99.95

  10. Levenhuk - 40mm Ra 2" ED Eyepiece

    Levenhuk - 40mm Ra 2" ED Eyepiece

    Levenhuk Ra 40 mm 2" ED is a low-powered parfocal eyepiece that performs equally well during terrestrial and celestial observations.

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    (48 States)
    Model#: 35430
    $219.95

  11. Levenhuk - 6mm Ra LER Eyepiece

    Levenhuk - 6mm Ra LER Eyepiece

    Levenhuk Ra LER 6 mm is a practical eyepiece with a focal length of 6 mm and an eye relief of 20 mm. This eyepiece is perfect for planetary observations and is capable of producing sharp and clear views.

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    Model#: 35011
    $99.95

  12. Levenhuk - 9mm Ra ER20 WA Eyepiece

    Levenhuk - 9mm Ra ER20 WA Eyepiece

    Levenhuk Ra ER20 WA 9 mm is a wonderful wide-angle eyepiece with a 9-mm focal length and an apparent field of view of 68°. Its 20-mm eye relief allows you to observe the celestial sphere in comfort when wearing glasses.

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    (48 States)
    Model#: 35006
    $269.95

  13. Levenhuk - Ra 1.25" Zoom 7.5-22.5 mm, 66-42° Eyepiece

    Levenhuk - Ra 1.25" Zoom 7.5-22.5 mm, 66-42° Eyepiece

    Levenhuk Ra 1.25" Zoom 7.5-22.5 mm, 66-42° is a parfocal zoom eyepiece that allows you to change focal length within the 7.5–22.5 mm range. This eyepiece is capable of completely replacing several eyepieces, which makes it a great choice for any stargazer.

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    (48 States)
    Model#: 50924
    $359.95

  14. Lumicon - 1.25 " Gold Series Eyepiece 10mm

    Lumicon - 1.25 " Gold Series Eyepiece 10mm

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    Model#: LL3100

    Regular Price: $154.00

    Special Price: $109.95

  15. Lumicon - 1.25 " Gold Series Eyepiece 15mm

    Lumicon - 1.25 " Gold Series Eyepiece 15mm

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    Model#: LL3150

    Regular Price: $154.00

    Special Price: $109.95

  16. Lumicon - 1.25 " Gold Series Eyepiece 25mm

    Lumicon - 1.25 " Gold Series Eyepiece 25mm

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    Model#: LL3250

    Regular Price: $164.00

    Special Price: $116.95

  17. Lumicon - 1.25 " Gold Series Eyepiece 30mm

    Lumicon - 1.25 " Gold Series Eyepiece 30mm

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    Model#: LL3300

    Regular Price: $220.00

    Special Price: $153.95

  18. Lumicon - 1.25 " Gold Series Eyepiece 35mm

    Lumicon - 1.25 " Gold Series Eyepiece 35mm

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    Model#: LL3350

    Regular Price: $275.00

    Special Price: $208.95

  19. Lumicon - 1.25 " Gold Series Eyepiece 7.5mm

    Lumicon - 1.25 " Gold Series Eyepiece 7.5mm

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    Model#: LL3075

    Regular Price: $154.00

    Special Price: $109.95

  20. Lumicon - 1.25" Gold Series Eyepiece 20mm

    Lumicon - 1.25" Gold Series Eyepiece 20mm

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    Model#: LL3200

    Regular Price: $164.00

    Special Price: $116.95

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