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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.
SVBONY Petzval Refractor Astrograph Lens | SVBONY SV545
SVBONY SV545 45mm f/4.5 203mm Petzval Refractor Astrograph Lens
SVBONY SV545 45mm f/4.5 203mm Petzval Refractor Astrograph Lens
SVBONY SV545 45mm f/4.5 203mm Petzval Refractor Astrograph Lens
SVBONY SV545 45mm f/4.5 203mm Petzval Refractor Astrograph Lens
SVBONY SV545 45mm f/4.5 203mm Petzval Refractor Astrograph Lens
SVBONY SV545 45mm f/4.5 203mm Petzval Refractor Astrograph Lens
SVBONY SV545 45mm f/4.5 203mm Petzval Refractor Astrograph Lens
SVBONY SV545 45mm f/4.5 203mm Petzval Refractor Astrograph Lens
SVBONY SV545 45mm f/4.5 203mm Petzval Refractor Astrograph Lens
SVBONY Petzval Refractor Astrograph Lens | SVBONY SV545

SVBONY SV545 45mm f/4.5 203mm Petzval Refractor Astrograph Lens

par SVBONY
UGC SV-W9317B
$399.99 - $399.99
$399.99
$399.99 - $399.99
$399.99
Égalisation de prix!
  • 45mm Aperture
  • 203mm Focal Length (f/4.5)
  • 5-Element Petzval Optical Design
  • Native Flat-Field Astrograph
  • Helical Focuser with 360º Rotator
  • M48x0.75 Camera Connection
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Petzval Refractor Astrograph Lens | SVBONY SV545

    The SVBONY SV545 is a dedicated wide-field astrograph, combining a fast f/4.5 focal ratio with a 203mm focal length in a compact 45mm aperture optical system. Its 5-element Petzval design provides a natively flat field without the need for an external corrector, delivering sharp stars across the frame with any modern astronomy camera.

    45mm f/4.5 Petzval Optics: 5 Elements for a Native Flat Field

    The SV545's optical core is a 5-element Petzval design arranged in 3 groups, engineered to eliminate field curvature right out of the box. This means you don't need a separate field flattener to achieve pinpoint stars, simplifying your imaging train and reducing costs. With a 45mm aperture and a fast f/4.5 focal ratio, you can capture faint, extended objects like the North American Nebula (NGC 7000) or the Andromeda Galaxy (M31) with shorter exposure times.

    • Fully Multi-Coated (FMC) Optics: All air-to-glass surfaces are coated to maximize light transmission and contrast, ensuring rich color and detail in your images.
    • Wide-Field Specialist: The 203mm focal length is purpose-built for capturing large swaths of the Milky Way and large-scale nebulae, not for high-magnification planetary viewing where its 45mm aperture would be a limitation.

    EAF-Ready Helical Focuser with 360° Rotation

    Achieving critical focus is managed by a robust helical focuser designed for modern astrophotography workflows. The focuser is built to be compatible with popular Electronic Auto Focusers (EAFs), allowing you to automate your focusing routine for maximum sharpness. A lockable 360° rotator is integrated into the body, letting you frame your target perfectly without rotating your camera and upsetting your cable management.

    All-Metal Build: 2750g with an M48x0.75 Connection

    The SV545 is constructed with an all-metal body and sealed optics, providing durability for fieldwork in changing environmental conditions. At an estimated weight of 2750g, it remains portable enough for lightweight star trackers and travel mounts. The rear of the astrograph terminates in a standard M48x0.75 male thread, enabling a secure, direct connection to DSLRs (with an M48 T-ring), dedicated astronomy cameras, and filter wheels.

    • Dovetail Plate Mount: A standard dovetail plate allows for quick and secure attachment to a wide range of equatorial mounts and trackers.
    • Simplified Imaging Train: The standard M48 connection and native flat-field design remove the need for extra adapters and correctors, creating a more rigid and reliable optical setup.

  • Do I need a field flattener or reducer for the SVBONY SV545?

    No. The SVBONY SV545 uses a Petzval optical design, which produces a natively flat imaging field without any external correctors. You can connect your camera directly and expect sharp stars from edge to edge.

    How do I connect my camera to the SV545 astrograph?

    The SV545 features a standard M48x0.75 male thread at the back. You can connect most dedicated astronomy cameras and filter wheels directly. For a DSLR or mirrorless camera, you will need a corresponding M48 T-ring for your camera brand.

    Is the SVBONY SV545's focuser compatible with an EAF?

    Yes, the product is designed with a helical focuser that is pre-equipped for mounting an Electronic Auto Focuser (EAF). This allows for precise, automated focusing during an imaging session.

    What kind of mount is needed for the 2750g SVBONY SV545?

    With an estimated weight of 2750g, the SV545 is well-suited for portable star trackers (like a Sky-Watcher Star Adventurer) or small equatorial mounts. Its compact size and weight make it an excellent choice for a travel astrophotography setup.

    How would the SV545 frame large targets like the Orion Nebula (M42)?

    The 203mm focal length of the SVBONY SV545 is ideal for framing large deep-sky objects. When paired with a common APS-C or Micro Four Thirds sensor, it will comfortably capture the entirety of the Orion Nebula (M42), including the surrounding nebulosity and the Running Man Nebula (NGC 1977), in a single shot.

    Is the SVBONY SV545 suitable for planetary imaging?

    No, this is not the ideal instrument for planets. The SV545 is a wide-field astrograph with a short 203mm focal length and small 45mm aperture. While you could see Jupiter's moons, it lacks the magnification and resolution needed to capture detail on planetary surfaces. A Schmidt-Cassegrain or Maksutov-Cassegrain would be a better choice for that purpose.

  • Objective Type Petzval Design (5 Elements in 3 Groups)
    Aperture 45mm
    Focal Length 203mm
    Focal Ratio f/4.5
    Optical Coatings Fully Multi-Coated (FMC)
    Focuser Helical
    Camera Rotator Lockable 360º
    Camera Connection M48x0.75 Male Thread
    Mount Type Dovetail Plate
    Estimated Weight 2750g
  • SVBONY 1-Year Warranty