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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 - 24mm 82° Series Nitrogen-Purged Waterproof Eyepiece; Fully Multi-Coated; 2-inch O.D.

    Explore Scientific - 24mm 82° Series Nitrogen-Purged Waterproof Eyepiece; Fully Multi-Coated; 2-inch O.D.

    24mm 82° Series Nitrogen-Purged Waterproof Eyepiece; Fully Multi-Coated; 2-inch O.D. ... Learn More
    Model#: EPWP8224-00
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $339.99

    Special Price: $199.99

  2. Explore Scientific - 25mm 100° Series Argon-Purged Waterproof Eyepiece; Fully Multi-Coated; 2-inch O.D.

    Explore Scientific - 25mm 100° Series Argon-Purged Waterproof Eyepiece; Fully Multi-Coated; 2-inch O.D.

    ... Learn More
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    Model#: EP10025-01
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    Regular Price: $999.99

    Special Price: $599.99

  3. Explore Scientific - 28mm 68° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 2-inch O.D.

    Explore Scientific - 28mm 68° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 2-inch O.D.

    28mm 68° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 2-inch O.D. ... Learn More
    Model#: EPWP6828-01
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $249.99

    Special Price: $149.99

  4. Explore Scientific - 30mm 100° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 3-inch O.D

    Explore Scientific - 30mm 100° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 3-inch O.D

    Expected to be available by summer of 2013. Pre-order now!

    Explore Scientific has also designed a 3" Diagonal to go with this eyepiece. Purchased seperately.

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    Model#: EP10030-01
    Item is currently pre-order. Expected to be available by summer of 2013.

    Regular Price: $1,999.99

    Special Price: $1,199.99

  5. Explore Scientific - 30mm 82° Series Nitrogen-Purged Waterproof Eyepiece; Fully Multi-Coated; 2-inch O.D.

    Explore Scientific - 30mm 82° Series Nitrogen-Purged Waterproof Eyepiece; Fully Multi-Coated; 2-inch O.D.

    30mm 82° Series Nitrogen-Purged Waterproof Eyepiece; Fully Multi-Coated; 2-inch O.D. ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: EPWP8230-00
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $419.99

    Special Price: $249.99

  6. Explore Scientific - 34mm 68° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 2-inch O.D.

    Explore Scientific - 34mm 68° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 2-inch O.D.

    34mm 68° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 2-inch O.D. ... Learn More
    Model#: EPWP6834-01
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $339.99

    Special Price: $199.99

  7. Explore Scientific - 40mm 68° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 2-inch O.D.

    Explore Scientific - 40mm 68° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 2-inch O.D.

    40mm 68° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 2-inch O.D. ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: EPWP6840-01
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $419.99

    Special Price: $249.99

  8. Explore Scientific - 68° Argon-Purged Waterproof Eyepieces - sizes: 16mm, 20mm, 24mm, 28mm, 34mm, 40mm
  9. Explore Scientific - 68° Series 20mm Waterproof Eyepiece - 1.25"

    Explore Scientific - 68° Series 20mm Waterproof Eyepiece - 1.25"

    20mm 68° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 1.25-inch O.D. ... Learn More
    Model#: EPWP6820-01
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $169.00

    Special Price: $99.99

  10. Explore Scientific - 68° Series 24mm Waterproof Eyepiece - 1.25"

    Explore Scientific - 68° Series 24mm Waterproof Eyepiece - 1.25"

    24mm 68° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 1.25-inch O.D. ... Learn More
    Model#: EPWP6824-01
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $199.99

    Special Price: $119.99

  11. Explore Scientific - 68° Series Argon-Purged 16mm Waterproof Eyepiece - 1.25"

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

    16mm 68° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 1.25-inch O.D.

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    Model#: EPWP6816-01
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $169.99

    Special Price: $99.99

  12. Explore Scientific - 70° Series 10mm Eyepiece - 1.25"

    DISCONTINUED: Explore Scientific - 70° Series 10mm Eyepiece - 1.25"

    Explore Scientific 70 Degree 10mm Eyepeice, 1.25" Barrel This Explore Scientific   10mm 1.25" eyepiece offers a wide 70º apparent field of view for an amazingly low price! Five element design produces high-contrast images

    Please see the 15mm 70 degree eyepiece as an alternative

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    Model#: EP7010-00
    Take advantage of this incredible 2013 Spring Promotion Program
  13. Explore Scientific - 70° Series 15mm Eyepiece - 1.25"

    Explore Scientific - 70° Series 15mm Eyepiece - 1.25"

    This Explore Scientific   15 mm 1.25" eyepiece offers a wide 70º apparent field of view for an amazingly low price! Five element design produces high-contrast images

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    Model#: EP7015-00
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $69.95

    Special Price: $59.95

  14. Explore Scientific - 70° Series 20mm Eyepiece - 1.25"

    Explore Scientific - 70° Series 20mm Eyepiece - 1.25"

    This Explore Scientific 20mm 1.25" eyepiece offers a wide 70º apparent field of view for an amazingly low price! Five element design produces high-contrast images

    ...
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    Model#: EP7020-00
    Take advantage of this incredible 2013 Spring Promotion Program
    $59.99

  15. Explore Scientific - 8.8mm 82° Series Nitrogen-Purged Waterproof Eyepiece; Fully Multi-Coated; 1.25-inch O.D.

    Explore Scientific - 8.8mm 82° Series Nitrogen-Purged Waterproof Eyepiece; Fully Multi-Coated; 1.25-inch O.D.

    8.8mm 82° Series Nitrogen-Purged Waterproof Eyepiece; Fully Multi-Coated; 1.25-inch O.D. ... Learn More
    Model#: EPWP8288-00
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $169.99

    Special Price: $99.99

  16. EP8230-00

    DISCONTINUED: Explore Scientific - 82 Series Eyepiece 30mm

    Explore Scientific - 82 Series Eyepiece 30mm

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    Model#: EP8230-00
    Take advantage of this incredible 2013 Spring Promotion Program
  17. Explore Scientific - 82° Argon-Purged Waterproof Eyepieces - sizes: 4.7mm, 6.7mm, 8.8mm, 11mm, 14mm, 18mm, 24mm, 30mm
  18. Explore Scientific - 82° Series 18mm Nitrogen Purged Waterproof Eyepiece - 2"

    Explore Scientific - 82° Series 18mm Nitrogen Purged Waterproof Eyepiece - 2"

    82° Series 18mm Waterproof N2 Eyepiece Specifications:Barrel Size: 2.00" Eye Relief: 13mmElements: 6 in 4 GroupsParfocal: YesWaterproofN2 filledAll Explore Scientific telescope accessories are covered under their standard U.S.A ... Learn More
    Model#: EPWP8218-00
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $249.99

    Special Price: $149.99

  19. Explore Scientific - 82° Series 4.7mm Nitrogen Purged Waterproof Eyepiece - 1.25"

    Explore Scientific - 82° Series 4.7mm Nitrogen Purged Waterproof Eyepiece - 1.25"

    4.7mm 82° Series Nitrogen-Purged Waterproof Eyepiece; Fully Multi-Coated; 1.25-inch O.D. ... Learn More
    Model#: EPWP8247-00
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $169.99

    Special Price: $99.99

  20. Explore Scientific - 82° Series 6.7mm Nitrogen Purged Waterproof Eyepiece - 1.25"

    Explore Scientific - 82° Series 6.7mm Nitrogen Purged Waterproof Eyepiece - 1.25"

    82° Series 6.7mm Waterproof N2 Eyepiece Specifications:Barrel Size: 1.25" Eye Relief: 14mmElements: 7 in 4 GroupsParfocal: YesWaterproofN2 filledAll Explore Scientific telescope accessories are covered under their standard U.S.A ... Learn More
    Model#: EPWP8267-00
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $169.99

    Special Price: $99.99

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