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SVBONY 9mm 68° Telescope Eyepiece - 1.25"
The SVBONY 9mm 68° Telescope Eyepiece expands your view with its 68° apparent field. Its 6-element optical design gives good color correction and contrast at medium-high magnification, while the comfortable 17mm of eye relief makes observing sessions more relaxed. This 1.25" eyepiece features fully multi-coated optics for bright images and weighs just 190g, making it a lightweight addition to any accessory case.
The 68° Apparent Field of View: A Wider Window
With a 68° apparent field of view, this eyepiece provides a noticeably larger and more immersive window on the sky than typical 50-52° Plössl or Kellner designs. This wider field makes it easier to frame larger deep-sky objects, locate targets, and follow planets as they drift across the field of view without needing to move the telescope as often.
6-Element Design with Full Multi-Coatings for Enhanced Contrast
The optical path consists of 6 glass elements arranged in 4 groups, a design chosen for good color correction and contrast. Every air-to-glass surface is treated with a broadband green fully multi-coated layer to maximize light transmission. To further improve contrast, the interior of the aluminum housing and the edges of the lenses are blackened to absorb stray light and prevent internal reflections from washing out faint details.
Comfortable Viewing: 17mm Eye Relief in a 190g Body
A generous 17mm of eye relief means you do not have to press your eye against the lens, which helps observers who wear glasses. A foldable rubber eyecup extends to block stray ambient light for non-eyeglass wearers and folds down to accommodate glasses. The eyepiece is housed in a two-step anodized aluminum body and weighs 190g.
SVBONY 9mm 68° vs. a Standard 9mm Plössl
Compared to a standard 9mm Plössl eyepiece, which typically offers a 50-52° apparent field, the SVBONY 9mm 68° model presents a significantly wider perspective. While both provide the same magnification, the 68° eyepiece allows you to see more of the surrounding starfield, which is invaluable for context and composition.
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Wider Field: The primary advantage is the 68° AFOV, which creates a more engaging "spacewalk" feel compared to the more constrained view of a Plössl.
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Eye Relief: At 17mm, the eye relief is considerably longer than what is found on most short focal length Plössls, improving comfort, especially for observers with glasses.
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Optical Complexity: The 6-element design is more advanced than a Plössl's 4-element design, used to support the wider field of view.
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How does the SVBONY 9mm 68° eyepiece's view compare to a standard Plössl?
The SVBONY 9mm 68° provides the same magnification as a 9mm Plössl but with a much wider 68° apparent field of view compared to the typical 50-52° of a Plössl. This means you see a larger patch of sky, making it feel more immersive and easier to frame celestial objects.
What can I expect when viewing the Orion Nebula (M42) with the SVBONY 9mm 68° eyepiece in an 8" f/10 SCT?
In a typical 8" f/10 SCT (around 2000mm focal length), this 9mm eyepiece will yield approximately 222x magnification. The 68° field of view will be ideal for focusing on the Trapezium star cluster at the heart of the Orion Nebula, resolving its four main stars and showing the nebulosity around them.
Is the 17mm eye relief on the SVBONY 9mm eyepiece sufficient for observing with eyeglasses?
Usually, yes. 17mm of eye relief is comfortable for most eyeglass wearers; fold down the rubber eyecup to bring your eye to the correct distance. Whether you see the very edge of the field with glasses on depends on your frames.
What is the benefit of the "broadband green coating" on this 9mm eyepiece?
The broadband green coating is a type of fully multi-coating (FMC) applied to the lens surfaces. Its purpose is to reduce reflections and increase light transmission across a wide range of wavelengths, resulting in a brighter, higher-contrast image compared to eyepieces with simpler coatings.
Will the SVBONY 9mm 68° eyepiece accept standard 1.25" filters?
Yes, the 1.25" barrel of the SVBONY 9mm eyepiece is threaded to accept all standard 1.25" astronomy filters, such as moon filters, color filters for planetary observing, or light pollution filters.
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| Brand |
SVBONY |
| Model |
F9152B |
| SKU |
SV-F9152B |
| Optical Specifications |
| Optical Design |
6 elements in 4 groups |
| Focal Length |
9mm |
| Apparent Field of View |
68° |
| Coatings |
Fully multi-coated (broadband green) |
| Mechanical Specifications |
| Barrel Size |
1.25" |
| Eye Relief |
17mm |
| Eyecup |
Foldable rubber eyeguard |
| Filter Threads |
Standard 1.25" |
| Housing Material |
Aluminum with two-step anodized matte finish |
| Internal Baffling |
Blackened interior |
| Weight |
190g |
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SVBONY 9mm 68° Telescope Eyepiece - 1.25"
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SVBONY Warranty
