ZWO 0.75x REDUCER FOR FF65

The ZWO 0.75x Flattener/Reducer for the FF65 is a 2.5" corrector for full frame sensors. The flattener/reducer is a quadruplet design with one element of ED (Extra-low Dispersion) glass. The 0.75x reduction factor shortens the focal ratio of the FF65 to f/4.8, shortening the exposure time and increasing the field of view.

When paired with this flattener/reducer, the focal length of the FF65 becomes 312mm, transforming it into an extremely capable widefield astrograph. The flattener/reducer has a backfocus requirement of 55mm, making it straightforward to connect common imaging trains. An internal M48 x 0.75 thread allows you to attach standard 2" filters.

1. Remove the reducer from its packaging.

2. Unscrew the eyepiece holder from the end of the FF65 telescope tube.

3. Unscrew the dust cap from the front of the reducer.

4. Insert the reducer into the focuser and screw in to the rear threads on the drawtube.