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SVBONY SV154 15mm SWA Eyepiece - 1.25"
SVBONY SV154 15mm 70° SWA Telescope Eyepiece - 1.25"
SVBONY SV154 15mm 70° SWA Telescope Eyepiece - 1.25"
SVBONY SV154 15mm 70° SWA Telescope Eyepiece - 1.25"
SVBONY SV154 15mm 70° SWA Telescope Eyepiece - 1.25"
SVBONY SV154 15mm 70° SWA Telescope Eyepiece - 1.25"
SVBONY SV154 15mm 70° SWA Telescope Eyepiece - 1.25"
SVBONY SV154 15mm 70° SWA Telescope Eyepiece - 1.25"
SVBONY SV154 15mm SWA Eyepiece - 1.25"

SVBONY SV154 15mm 70° SWA Telescope Eyepiece - 1.25"

par SVBONY
UGC SV-W9117A
CA$58.00 - CA$58.00
CA$58.00
CA$58.00 - CA$58.00
CA$58.00
Égalisation de prix!
  • 15mm Focal Length
  • 70° Super-Wide Apparent Field of View
  • 1.25-inch Barrel Diameter
  • 13mm Eye Relief
  • 5-Element / 4-Group Optical Design
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • SVBONY SV154 15mm SWA Eyepiece - 1.25"

    The SVBONY SV154 15mm SWA eyepiece delivers a 70° apparent field of view in a standard 1.25-inch barrel, offering a significant upgrade in immersion over classic eyepiece designs. Its 5-element, 4-group optical design features a 18.8mm field stop to maximize the view, while providing 13mm of eye relief for comfortable observing sessions.

    A 70° Super-Wide-Angle View in a 1.25" Barrel

    The 70° apparent field provides a wide, immersive window that keeps celestial objects framed with their surrounding star fields. The 5-element in 4-group optical system is fully multi-coated for high light transmission, and all lens edges are blackened to reduce internal reflections and improve contrast, making background skies appear darker and details on planets and nebulae more distinct.

    13mm Eye Relief and Twist-Up Eyecup for Viewing Comfort

    With 13mm of eye relief, the SV154 allows many observers to see the full field of view comfortably. While this distance may be tight for some eyeglass wearers, the integrated twist-up eyecup helps non-eyeglass users position their eye at the correct distance and blocks stray light for a higher-contrast view.

    • Standard Filter Threads: The 1.25" barrel is threaded for standard M28.5 x 0.6 filters, allowing you to easily add a moon filter or light pollution filter.
    • Safety Recess: A machined recess on the barrel helps prevent the eyepiece from accidentally slipping out of the focuser if a thumbscrew loosens.

    SV154 15mm vs. a Standard 15mm Plössl: Field of View and Immersion

    Compared to a standard 15mm Plössl eyepiece, which typically offers a 50-52° apparent field, the SV154's 70° field is noticeably wider. This expanded view is a significant advantage when observing large open clusters like the Pleiades (M45) or scanning the rich star fields of the Milky Way, as you can fit more of the object and its context into a single view without needing to move the telescope.

  • What is the main advantage of the SVBONY SV154 15mm over a standard Plössl?

    The primary advantage is the 70° apparent field of view, which is significantly wider than the approximate 52° field of a Plössl. This creates a more immersive, "spacewalk" viewing experience and allows you to see a larger patch of sky at the same magnification.

    Is the 13mm eye relief on the SV154 15mm SWA sufficient for eyeglass wearers?

    The 13mm eye relief is borderline for many eyeglass wearers. While some users with glasses may find it acceptable, others might not be able to see the entire 70° field of view. Observers who do not wear glasses will find it comfortable, especially with the adjustable twist-up eyecup.

    How does the SVBONY SV154 15mm perform on open clusters like the Pleiades (M45) in an 8" f/10 Schmidt-Cassegrain telescope?

    In a typical 8" SCT with a 2000mm focal length, the SV154 15mm eyepiece yields 133x magnification. The 70° field of view is ideal for framing large objects like the Pleiades (M45) or the Beehive Cluster (M44), showing the main stars and their surrounding nebulosity within a single, well-defined frame.

    Can I use standard 1.25" filters with the SV154 15mm eyepiece?

    Yes. The barrel of the SVBONY SV154 is threaded with the standard M28.5 x 0.6 thread pitch, making it compatible with all standard 1.25" astronomical filters, such as moon filters, color filters, and light pollution reduction filters.

    What kind of views can I expect from the SV154 15mm on the Moon with an 80mm refractor?

    In a short-tube 80mm refractor (e.g., f/6, 480mm focal length), this eyepiece provides 32x magnification. This is an excellent low-power magnification for viewing the entire lunar disc at once, with plenty of dark sky around it to frame the view, making it perfect for public outreach or enjoying a full-disc perspective of the Moon's phases.

    What does the 5-element/4-group design of the SVBONY SV154 15mm eyepiece mean for image quality?

    This more complex optical design, compared to a 4-element Plössl, is necessary to achieve the wide 70° field of view while controlling for optical aberrations like distortion and chromatic aberration. The use of fully multi-coated surfaces and blackened lens edges ensures the image remains bright and high-contrast.

  • Focal Length 15mm
    Apparent Field of View 70°
    Barrel Size 1.25 inch
    Eye Relief 13mm
    Field Stop Diameter 18.8mm
    Lens Structure 5 Elements in 4 Groups
    Lens Coating Fully Multi-Coated
    Filter Threads Standard 1.25" (M28.5 x 0.6)
    Blackened Lens Edges Yes
    Barrel Safety Recess Yes
    Eyecups Twist-Up
    Eyecups Material Glass & Metal
  • SVBONY Warranty Policy