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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 - 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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    Model#: 50924
    $359.95

  6. Lumicon - 1.25 " Gold Series Eyepiece 10mm

    Lumicon - 1.25 " Gold Series Eyepiece 10mm

    Focal length: 10mmBarrel diameter: 1 ... Learn More
    Model#: LL3100
    $109.95

  7. Lumicon - 1.25 " Gold Series Eyepiece 15mm

    Lumicon - 1.25 " Gold Series Eyepiece 15mm

    Focal length: 15mmBarrel diameter: 1 ... Learn More
    Model#: LL3150
    $109.95

  8. Lumicon - 1.25 " Gold Series Eyepiece 20mm

    Lumicon - 1.25 " Gold Series Eyepiece 20mm

    Focal length: 20mmBarrel diameter: 1 ... Learn More
    Model#: LL3200
    $116.95

  9. Lumicon - 1.25 " Gold Series Eyepiece 25mm

    Lumicon - 1.25 " Gold Series Eyepiece 25mm

    Focal length: 25mmBarrel diameter: 1 ... Learn More
    Model#: LL3250
    $105.95

  10. Lumicon - 1.25 " Gold Series Eyepiece 30mm

    Lumicon - 1.25 " Gold Series Eyepiece 30mm

    Focal length: 30mmBarrel diameter: 1 ... Learn More
    Model#: LL3300
    $153.95

  11. Lumicon - 1.25 " Gold Series Eyepiece 35mm

    Lumicon - 1.25 " Gold Series Eyepiece 35mm

    Focal length: 35mmBarrel diameter: 1 ... Learn More
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    Model#: LL3350
    $208.95

  12. Lumicon - 1.25 " Gold Series Eyepiece 7.5mm

    Lumicon - 1.25 " Gold Series Eyepiece 7.5mm

    Focal length: 7.5mmBarrel diameter: 1 ... Learn More
    Model#: LL3075
    $109.95

  13. Lumicon - 1.25in Silver Series Eyepiece 10mm

    Lumicon - 1.25in Silver Series Eyepiece 10mm

    Focal length: 10mmBarrel diameter: 1 ... Learn More
    Model#: LL2100
    $49.95

  14. Lumicon - 1.25in Silver Series Eyepiece 12.5mm

    Lumicon - 1.25in Silver Series Eyepiece 12.5mm

    Focal length: 12.5mmBarrel diameter: 1 ... Learn More
    Model#: LL2125
    $49.95

  15. Lumicon - 1.25in Silver Series Eyepiece 17mm

    Lumicon - 1.25in Silver Series Eyepiece 17mm

    Focal length: 17mmBarrel diameter: 1 ... Learn More
    Model#: LL2170
    $49.95

  16. Lumicon - 1.25in Silver Series Eyepiece 20mm

    Lumicon - 1.25in Silver Series Eyepiece 20mm

    Focal length: 20mmBarrel diameter: 1 ... Learn More
    Model#: LL2200
    $49.95

  17. Lumicon - 1.25in Silver Series Eyepiece 25mm

    Lumicon - 1.25in Silver Series Eyepiece 25mm

    Focal length: 25mmBarrel diameter: 1 ... Learn More
    Model#: LL2250
    $49.95

  18. Lumicon - 1.25in Silver Series Eyepiece 32mm

    Lumicon - 1.25in Silver Series Eyepiece 32mm

    Focal length: 32mmBarrel diameter: 1 ... Learn More
    Model#: LL2320
    $65.95

  19. Lumicon - 1.25in Silver Series Eyepiece 40mm

    Lumicon - 1.25in Silver Series Eyepiece 40mm

    Focal length: 40mmBarrel diameter: 1 ... Learn More
    Model#: LL2400
    $71.95

  20. Lumicon - 1.25in Silver Series Eyepiece 6.3mm

    Lumicon - 1.25in Silver Series Eyepiece 6.3mm

    Focal length: 6.3mmBarrel diameter: 1 ... Learn More
    Model#: LL2063
    $49.95

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