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June 24th: Store is closed for Quebec National Holiday. Orders placed that day will ship on June 25th.
ZWO FF107/FF130 APO 0.7× Universal Reducer

ZWO FF107/FF130 APO 0.7× Universal Reducer

by ZWO
SKU ZWO-F107130RE
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$349.00
$349.00 - $349.00
$349.00
$309.00
$309.00 - $309.00
$309.00
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  • 0.7x Focal Reduction Factor
  • Designed for ZWO FF107 & FF130 APO Refractors
  • Triplet Optical Design with 1 ED Element
  • Standard 55mm Back Focus
  • Includes M68, M54, and M48 Adapters
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • ZWO 0.7x Full-Frame Reducer for FF107-APO and FF130-APO Refractors

    The ZWO 0.7x Full-Frame Reducer is engineered specifically for the FF107-APO and FF130-APO refractors, transforming them into faster, wider imaging systems. Its triplet optical design uses one ED element to maintain sharp stars across the field, while the standard 55mm back focus and included M48, M54, and M68 adapters ensure compatibility with your existing imaging train.

    0.7x Reduction for Faster, Wider Imaging

    By reducing the effective focal length of your FF107-APO or FF130-APO by a factor of 0.7x, this accessory significantly expands your field of view. This allows you to frame large targets like the Andromeda Galaxy (M31) or the North American Nebula (NGC 7000) in a single exposure. The resulting faster focal ratio means you gather the same amount of signal in roughly half the time, reducing demands on your mount's tracking and minimizing frames lost to weather.

    Triplet ED Optics for Full-Frame Correction in a 3" Barrel

    This is not a generic reducer. The 3-element optical design incorporates one ED (Extra-Low Dispersion) glass element to suppress chromatic aberration and ensure sharp, high-contrast stars from the center to the edge of a full-frame sensor. It is optically matched to the FF107 and FF130 refractors to preserve the apochromatic performance of the main objective lenses, delivering a flat, well-corrected field.

    Standard 55mm Back Focus with M48, M54 & M68 Adapters

    Integrating the reducer into your imaging train is straightforward. It is designed for a standard 55mm back focus distance, the industry default for most cooled astronomy cameras, filter wheels, and off-axis guiders. To ensure broad compatibility, ZWO includes M68, M54, and M48 adapters, giving you the flexibility to connect to virtually any camera or accessory without sourcing additional parts.

  • How does the ZWO 0.7x reducer change imaging with my FF107 APO?

    The 0.7x reducer makes your FF107 APO a faster and wider instrument. You'll be able to fit larger deep-sky objects, like the entire Veil Nebula complex, into the frame. Because it also reduces exposure times, you can complete projects more quickly or capture fainter details in the same amount of time.

    What is the benefit of the ZWO 0.7x reducer for imaging the Andromeda Galaxy (M31) with an FF130 APO?

    At its native focal length, the FF130 APO is too magnified to capture the full extent of the Andromeda Galaxy (M31) with a large-format sensor. The 0.7x reducer widens the field of view enough to frame the galaxy and its companions, M32 and M110, comfortably in a single shot.

    Is the ZWO F107130RE reducer compatible with other telescopes?

    No, this reducer is specifically designed and optically matched for the ZWO FF107-APO and ZWO FF130-APO refractors. Using it with other telescopes will likely result in poor optical performance, such as field curvature and elongated stars at the edges of the frame.

    How do I connect my camera to achieve the 55mm back focus?

    The 55mm back focus is measured from the rear flange of the reducer's M48 adapter to your camera sensor. Most dedicated astronomy cameras have a native back focus of 17.5mm. You would typically use a combination of standard M48 spacers (not included) to make up the remaining 37.5mm distance. Always check your camera's documentation for its specific back focus measurement.

    Does the triplet design of the ZWO 0.7x reducer correct for field curvature?

    Yes. The reducer functions as both a focal reducer and a field flattener. Its triplet optical design is optimized to deliver a flat, sharp field across a full-frame sensor when used with the FF107 and FF130 telescopes, which already have a flat-field design.

    What do the included M68, M54, and M48 adapters for the ZWO reducer do?

    These adapters provide connection flexibility. The reducer itself has a native M68 thread. The included adapters allow you to step down the connection to M54 or the more common M48 (2-inch filter) thread standard, ensuring you can connect it to a wide variety of focusers, rotators, and camera systems.

  • SKU ZWO-F107130RE
    Type Reducer / Flattener
    Reduction Factor 0.7x
    Optical Design Triplet (3-element) with 1 ED element
    Back Focus 55 mm
    Included Adapters M68, M54, M48
    Compatible Telescopes ZWO FF107-APO, ZWO FF130-APO

    • 0.7x Full-Frame Reducer

      × 1

    • M68 Adapter

      × 1

    • M54 Adapter

      × 1

    • M48 Adapter

      × 1

  • ZWO 2-Year Limited Warranty