Experience Flat-Field Performance on the Cutting Edge
9mm Orion Edge-On Planetary Eyepiece in stock
#08886
$105.95
9mm Orion Edge-On Planetary Eyepiece
- Mid- and high-magnification 1.25" eyepieces designed for exceptional planetary and lunar viewing
- Flat field design ensures sharp focus out to the edge of their wide 55-degree apparent field of view
- Barrel distortion and field curvature commonly seen in standard eyepiece designs are gone
- Each eyepiece has long 20mm eye relief for comfortable viewing even with eyeglasses on
- Amazingly affordable Edge-Ons won't have you "on edge" financially!
Orion Edge-On Planetary telescope eyepieces bring flat-field performance to solar system viewing in the form of six medium- and high-magnification focal lengths. Each eyepiece employs a sophisticated 7-element lens design reminiscent of exotic, high-priced oculars. This design renders an optically flat image that's sharply focused from center to edge of the wide 55-degree apparent field of view. The barrel distortion and field curvature aberrations common in standard eyepiece designs are virtually gone.
Orion Edge-On Planetary telescope eyepieces let you push the power, whether you're canvassing the lunar terminator or studying the Jovian cloud belts. The optics are fully multi-coated for high light transmission, and each eyepiece has 20mm eye relief for viewing comfort. Other nice touches: blackened lens edges, pop-down rubber eyeguards, and 1.25" barrels threaded for filters.
Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.
Product Specifications:
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Design
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Proprietary |
Different eyepiece designs allow for a wide range of features, depending on the needs of the observer. Orthoscopic and Plossl designs can provide a great quality image with a standard field of view, but may be difficult to use at higher powers while wearing glasses due to the short eye-relief. Long eye-relief designs have more elements and can be more expensive, but work very well with glasses, even at higher powers. Wide angle designs provide a larger view of the sky at the same power as a standard eyepiece. More complex designs can combine all these attributes together in a single eyepiece.
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Eyepiece focal length
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9.0mm |
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Barrel size
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1.25in. |
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Apparent field of view
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55.0-deg |
The edge-to-edge angular diameter of the light emerging from the eyepiece as seen by the eye. It is an inherent specification for a given eyepiece type or design. The apparent field of view of an eyepiece is directly related to the true field of view seen through the telescope; for a given focal length eyepiece, the greater the eyepiece's apparent field of view, the greater area of sky will be seen.
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Eye relief
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20.0mm |
The distance, measured in millimeters, between the observer's eye and the eyepiece lens in which the entire field of view remains visible. Eye relief varies with the optical design but generally increases with decreasing magnification. Long eye relief is advantageous for observers who wear glasses, as they don't have to put their eye directly on the eyepiece to see the entire field of view, nor do they have to remove their eyewear.
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Coatings
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Fully Multi-coated |
Lenses are coated with an anti-reflective material to ensure that as little light as possible is reflected away, thus more gets to your eye. Good lenses are at least "fully coated," with a single layer of magnesium fluoride applied to each air-to-glass lens surface. Multiple layers of coatings are even more effective; the term "multi-coated" means one or more lens surfaces have multiple coatings. "Fully multi-coated" is superior because all lens surfaces are multiple-layer coated.
Mirror star diagonals are coated with a reflective material similar to telescope mirrors in order to reflect the light into the eyepiece. Standard aluminum coatings reflect between 88%-92%, and enhanced aluminum reflects 97%.
Dielectric coatings use a different process to deposit a coating that reflects 99% of the light. In addition to the higher reflectivity, Dielectric coatings are much more durable than aluminum coatings, so they last longer and can be cleaned with less risk of damage.
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Number of elements
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7 |
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Filter threads
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Yes |
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Parfocal
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Yes |
Parfocal refers to an attribute of an eyepiece set where little to no focusing is required when swapping out one eyepiece for another.
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Field stop diameter
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11.7mm |
The field stop is a mechanical ring in the eyepiece which provides the sharp edge to the field of view when looking through the eyepiece. The field stop diameter greatly affects the apparent field of view of the eyepiece; the larger the field stop diameter, the larger the apparent field of view is.
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Barrel security recess
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No |
The barrel security recess is a shallow groove or depression cut into the 1.25" or 2" barrel of the eyepiece. In the event the thumb screw holding the eyepiece in the focuser becomes slightly loose, the eyepiece will not fall out because the tip of the thumb screw will catch on the lip of the security groove.
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Blackened lens edges
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Yes |
Blackened lens edges in eyepieces and refractor lenses prevent unwanted light scatter inside the tube. This results in higher image contrast.
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Rubber eyeguards
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Yes |
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Body material
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Aluminum |
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Weight (oz.)
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7.00 |
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Dimensions
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3.7 in. x 1.7 in. |
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Warranty
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One year |
Included Items:
Orion 9mm Edge-On Planetary Telescope Eyepiece, 1.25"
dust caps
9mm Orion Edge-On Planetary Eyepiece
Reviewer: Wayne Alspach
Well I was finally able to take this
eyepiece out tonight to test out just
how well it would perform. I borrowed a
friends 10mm radian and @133x there was
not much difference between the two,
everyone agreed this eyepiece is a
definite keeper. In my 10" dob the moon
just blew us away, it was like looking
at it for the first time.Thank you
Orion, another satisfied customer.
9mm Orion Edge-On Planetary Eyepiece
Reviewer: Wing Eng
This eyepiece gave me an excellent view
of Jupiter, at 135X, when used with my 8
inch f/6 dobsonian telescope. Nice job,
Orion!
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