Cloud Break Optics

F65RE Reducer

F65RE Reducer - Main image
$161.85 $249 In stock

Category: Astrophotography Accessories

Product Description

FF65APO 0.75× Full Frame Reducer

ZWO has released a brand-new FF65APO 0.75× full frame reducer with a four-element optical design. It has a reduction factor of 0.75x, which gives the FF65APO f/6.4 astrograph a shortened focal ratio of f/4.8 and a shorter focal length of 312mm. This allows for less total integration time and a wider field of view, bringing more convenience and possibilities for your wide-field deep sky imaging. The back focus distance is the standard 55mm. It also comes with two thread adapters of M54 and M48, and a built-in M48x0.75 2” filter thread, which makes the connection work simple and convenient.

Connection steps:

  1. Prepare the FF65APO telescope tube and the focal reducer.
  2. Unscrew the eyepiece holder at the end of the FF65APO telescope tube.
  3. Unscrew the end cap of the 0.75X reducer.
  4. Insert the reducer into the focuser and tighten.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.4 / 5 · 5 reviews)

Riley N. ★★★★★

The 0.75× reduction factor paired with the full frame coverage is perfect for my FF65APO setup, as it cuts exposure times without sacrificing stars in the corners. I’ve noticed a sharper field than with my older reducer, which makes processing images much easier.

Richard W. ★★★★★

Finally got this reducer for my FF65APO and the 0.75x reduction makes framing larger targets like the Pleiades so much easier. My stars look crisp right to the corners of my full-frame sensor.

Charlotte Q. ★★★★★

The four-element design really shows in the stars—corner stars are tight and round across my full frame sensor with the 0.75× reduction. It threads on smoothly and feels solid, no tilt issues so far.