The ZWO Reducer 0.75x for FF65 APO is specially designed for the ZWO FF65 APO apochromatic refractor. This high-quality focal reducer shortens the focal length of the optics by a factor of 0.75, allowing you to achieve faster exposure times and capture a wider field of view. Ideal for deep-sky astrophotography of vast nebulae, star fields or galaxy structures.
This reducer is optically fully matched to the FF65 APO, ensuring a flat and sharp image across the entire field, even when using full-frame or APS-C cameras. Thanks to the included adapters with M48 and M54 threads, the reducer can be used flexibly within a variety of astrophotography setups.
With a 2″ insert size and integrated filter thread, you can easily use standard 2″ filters - without additional reducers or concessions to image quality.
Key features
✓ Specifically designed for the ZWO FF65 APO
✓ Shorten focal length with 25% (0.75x)
✓ Larger field of view and shorter exposure times
✓ Includes M48 and M54 adapters for maximum compatibility
✓ 2″ connection with built-in filter thread
✓ Excellent correction to the image edges
Technical specifications
Suitable for: ZWO FF65 APO
Focal reduction: 0.75x
Telescope connection: 2″
Camera connection: M48 & M54
Filter thread: Yes, for 2″ filters
Type: Reducer/reducer
Optical design: Customized for FF65 APO
Application
This reducer is perfect for those who want to get the most out of the ZWO FF65 APO in combination with an astro camera. Shortening the focal length makes the system faster (lower f-value), which is crucial for efficiently capturing faint deep-sky objects.






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