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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 SV106 Guide Scope 50mm with Helical Focuser
SVBONY SV106 50mm Guide Scope with Helical Focuser
SVBONY SV106 50mm Guide Scope with Helical Focuser
SVBONY SV106 50mm Guide Scope with Helical Focuser
SVBONY SV106 50mm Guide Scope with Helical Focuser
SVBONY SV106 Guide Scope 50mm with Helical Focuser

SVBONY SV106 50mm Guide Scope with Helical Focuser

par SVBONY
UGC SV-F9177A
$57.59 - $57.59
$57.59
$57.59 - $57.59
$57.59
Égalisation de prix!
  • 50mm Aperture
  • 190mm Focal Length (F3.8)
  • Zero-Flexure Helical Focuser
  • 8mm Focuser Travel
  • Includes Mounting Rings and Dovetail
En rupture temporaire
Alerte de retour en stock
Info disponibilité
Admissible à la livraison GRATUITE aux USA pour les commandes de plus de 350$.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • SVBONY SV106 Guide Scope 50mm with Helical Focuser

    With a 50mm aperture and a fast 190mm focal length (F3.8), the SVBONY SV106 Guide Scope delivers bright, wide-field views essential for locating faint guide stars. Its helical focuser provides 8mm of precise, repeatable travel for achieving sharp focus, while the standard 1.25-inch connection and integrated T-threads ensure a rigid connection to modern guide cameras.

    Fast F3.8 Optics: Finding Guide Stars at 50mm

    The SV106's optical design is centered on speed and a wide field of view. The fast F3.8 focal ratio of its 50mm achromatic objective gathers ample light, making dimmer stars visible and increasing your odds of finding a suitable guide star in any part of the sky. This combination is ideal for guiding wide-field refractors and astrographs where a broad view is necessary to match the imaging field.

    Zero-Flexure Helical Focuser with 8mm of Travel

    Mechanical flexure is the primary enemy of accurate guiding. The SV106 guide scope uses a helical focuser that eliminates the sag and shift common in standard drawtube designs. You achieve focus by rotating the barrel, not by sliding it, which maintains perfect alignment. With 8mm of fine adjustment controlled by a knurled ring and a thumbscrew to lock it in place, your guide camera remains rigidly fixed all night.

    Ready to Mount: Rings for the 54.5mm Tube

    The SV106 arrives ready for immediate integration into your imaging rig. It includes a set of sturdy tube rings for its 54.5mm tube and a dovetail rail compatible with most standard finder scope bases. Nylon-tipped metal thumbscrews allow for precise aiming of the guide scope without marring the tube's finish. For connecting your camera, the focuser accepts standard 1.25-inch nosepieces and features male T-threads for a direct, secure attachment.

    SV106 Guide Scope vs. an Off-Axis Guider (OAG)

    Choosing between a guide scope and an OAG involves a fundamental trade-off. An OAG uses the main telescope's light path, making it immune to differential flexure between two separate optical tubes, which is its primary advantage for very long focal length systems.

    The SV106 guide scope, however, offers a significant advantage in usability. Its independent, wide field of view makes finding a suitable guide star dramatically easier than searching for one in the narrow, dim periphery of an OAG's pick-off prism. For portable setups and telescopes under 1500mm focal length, a well-mounted guide scope like the SV106 provides a more straightforward and often more successful guiding experience.

  • What kind of cameras work with the SV106 50mm Guide Scope?

    The SV106 is compatible with nearly all dedicated astronomy guide cameras. You can connect a camera using either a standard 1.25-inch nosepiece or by threading it directly onto the focuser's male T-threads (M42x0.75) for the most secure, flex-free connection.

    How do I attach the SV106 Guide Scope to my telescope?

    The SV106 includes tube rings and a dovetail mounting rail. This rail is designed to fit into a standard finder scope base (like those from Vixen, Synta, or Orion). Simply slide the rail into your existing finder base and tighten the screws to secure it.

    Is the SV106's 190mm focal length suitable for guiding an 8" SCT on the Orion Nebula (M42)?

    Yes, it's an excellent choice for that scenario. An 8" SCT has a long focal length, which can make finding guide stars difficult with an OAG. The SV106's wide 190mm field of view makes it easy to find a bright guide star near M42. The key is to ensure the guide scope is mounted as rigidly as possible to the main telescope to prevent differential flexure during long exposures.

    What is the benefit of the SV106's helical focuser over a standard one?

    A standard drawtube focuser can tilt or sag as it extends, causing the guide star to shift and ruining your guiding accuracy. The helical focuser on the SV106 rotates to focus without changing its length, providing a zero-flexure mechanism. This ensures that once you achieve sharp focus, your guide camera remains perfectly aligned with the guide scope's optics.

    Can I use the SV106 50mm guide scope for visual observation?

    Absolutely. With a 1.25-inch eyepiece, the SV106 becomes a compact, fast F3.8 rich-field refractor. It's perfect for sweeping across the Milky Way or viewing large star clusters like the Pleiades (M45) and other expansive deep-sky objects from a dark site.

    Why would I choose the SV106 guide scope instead of an Off-Axis Guider (OAG)?

    You would choose the SV106 for its ease of use. Finding a suitable guide star with its wide, independent field of view is significantly simpler and faster than hunting for one with an OAG's small pick-off prism, especially on star-poor targets. While an OAG eliminates differential flexure, the SV106 offers a much more user-friendly experience for most imaging setups.

  • Aperture 50mm / 1.97in
    Focal Length 190mm / 7.48in
    Focal Ratio F3.8
    Optical Design Achromatic Refractor
    Coatings Fully multi-coated
    Focuser Type Helical Focuser
    Focuser Travel 8 mm
    Camera Connection 1.25-inch & T-Threads (M42x0.75)
    Tube Diameter 54.5mm
    Total Length 240mm
    Recommended Use Deep Sky Autoguiding

    • 50mm F3.8 Guide Scope

      × 1

    • Tube Rings

      × 2

    • Dovetail Mounting Rail

      × 1

  • SVBONY 1-Year Warranty