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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
SVBONY SV137 1.25" 2X FMC Barlow Lens
SVBONY SV137 2X FMC Barlow Lens with M42 Threads - 1.25"
SVBONY SV137 2X FMC Barlow Lens with M42 Threads - 1.25"
SVBONY SV137 2X FMC Barlow Lens with M42 Threads - 1.25"
SVBONY SV137 2X FMC Barlow Lens with M42 Threads - 1.25"
SVBONY SV137 2X FMC Barlow Lens with M42 Threads - 1.25"
SVBONY SV137 2X FMC Barlow Lens with M42 Threads - 1.25"
SVBONY SV137 2X FMC Barlow Lens with M42 Threads - 1.25"
SVBONY SV137 2X FMC Barlow Lens with M42 Threads - 1.25"
SVBONY SV137 2X FMC Barlow Lens with M42 Threads - 1.25"
SVBONY SV137 2X FMC Barlow Lens with M42 Threads - 1.25"
SVBONY SV137 2X FMC Barlow Lens with M42 Threads - 1.25"
SVBONY SV137 1.25" 2X FMC Barlow Lens

SVBONY SV137 2X FMC Barlow Lens with M42 Threads - 1.25"

by SVBONY
SKU SV-W9106B
$17.56 - $17.56
$17.56
$17.56 - $17.56
$17.56
Price Match Policy!
  • Instantly doubles the magnification of any 1.25" eyepiece
  • Fully multi-coated (FMC) optics for bright, high-contrast views
  • Features M42 x 0.75 T-threads for direct camera attachment
  • Brass compression ring secures eyepieces without scratching barrels
  • Durable, CNC-machined aluminum body
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • SVBONY SV137 1.25" 2X FMC Barlow Lens

    The SVBONY SV137 2X Barlow Lens instantly doubles the power of any 1.25" eyepiece, effectively expanding your magnification options without needing a separate set of high-power eyepieces. With integrated M42 x 0.75 T-threads, it also serves as a 2x amplifier for astrophotography, allowing direct connection to a DSLR T-ring for planetary and lunar imaging.

    2x Magnification Boost with Fully Multi-Coated Optics

    This Barlow lens doubles the magnification of your eyepiece, bringing out finer details on the Moon's surface, resolving the cloud bands of Jupiter, or splitting tight double stars. The fully multi-coated (FMC) lenses ensure that as magnification increases, light transmission remains high and contrast is preserved, preventing the washed-out images common with lesser Barlows. While any 2x Barlow narrows the field of view, the SV137's optical design maintains image sharpness and clarity.

    Secure Fit: 1.25" Barrel with Brass Ring and M42 Threads

    Built from CNC-machined aluminum, the SV137 is designed for durability in the field. Its 1.25" barrel features a non-marring brass compression ring that provides a secure, concentric grip on your eyepiece without scratching the barrel, unlike simple thumbscrew designs. For imagers, the top of the Barlow unscrews to reveal standard M42 T-threads, creating a solid, threaded connection to your camera for stable, focused shots.

  • How will the SVBONY SV137 2X Barlow affect the view of Jupiter in my 8" f/10 SCT?

    In a typical 8" f/10 SCT (around 2000mm focal length), a 10mm eyepiece yields 200x magnification. Adding the SVBONY SV137 Barlow will double this to 400x, which is near the practical limit for that aperture. This increased power will make Jupiter's Great Red Spot and individual cloud bands much larger and more distinct, assuming atmospheric seeing conditions are stable.

    Can I use the SVBONY SV137 Barlow Lens for astrophotography?

    Yes. The SV137 is ideal for planetary, lunar, and solar (with a proper telescope filter) imaging. The top section unscrews to reveal M42 x 0.75 T-threads. This allows you to connect a DSLR or dedicated astronomy camera directly using a T-ring, effectively doubling your telescope's focal length and image scale to capture more detail on small targets.

    What is the purpose of the brass compression ring on the SV137 Barlow?

    The brass compression ring provides a superior way to secure your 1.25" eyepieces. When you tighten the thumbscrew, it presses the soft brass ring gently and uniformly against the eyepiece barrel. This prevents the set screw from directly digging into and scratching the barrel, preserving the condition of your eyepieces.

    Will the SVBONY SV137 work with a small 70mm refractor for viewing the Moon?

    Absolutely. A 70mm refractor is an excellent instrument for lunar observing. Using the SV137 Barlow will double the magnification of your existing eyepieces, allowing you to zoom in on specific craters, rilles, and mountain ranges on the Moon's surface for a more detailed and immersive view.

    Are the optics in the SV137 Barlow fully multi-coated?

    Yes, the SVBONY SV137 features fully multi-coated (FMC) lenses. This means all air-to-glass surfaces have multiple layers of anti-reflection coatings applied, which maximizes light transmission and enhances image contrast and brightness compared to optics that are only single-coated or partially coated.

    Is the SVBONY SV137 compatible with all 1.25" eyepieces?

    Yes, the SV137 is designed to work with any standard 1.25" telescope eyepiece. Its brass compression ring ensures a secure fit for eyepieces of varying weights and designs without causing damage to their barrels.

  • Magnification Factor 2x
    Barrel Size 1.25"
    Optical Coatings Fully Multi-Coated (FMC)
    Camera Threads M42 x 0.75 (T-thread)
    Locking Mechanism Brass Compression Ring
    Body Material CNC-Machined Aluminum

    • SV137 1.25" 2X Barlow Lens

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  • SVBONY 1-Year Warranty