ZWO FF80 APO 0.76x Full-Frame Reducer: more field for the FF80
This reducer shortens the focal length of the ZWO FF80 APO from 600 to 456 mm and increases the focal ratio to f/5.7. Large nebulae and star fields thus fit into the full-frame field of view, and exposure times are reduced by nearly a quarter.
The three-element design with an ED glass element keeps stars round into the corners and the field flat. The built-in 2-inch filter thread (M48 x 0.75) accommodates narrowband or color filters without extra adapters, and the M48 and M54 output threads fit all common filter wheels and camera adapters.
Features
- From 600 to 456 mm focal length (0.76x, f/5.7)
- Three-element optics with ED glass for a flat full-frame field
- Built-in 2-inch filter thread (M48 x 0.75)
- M48 and M54 outputs for filter wheels and camera adapters
Compatibility
Exclusively for the ZWO FF80 APO: the reducer mounts directly onto the M68 flange of the telescope. For the FF65 APO, there is a dedicated 0.75x reducer.
Specifications
| Reduction factor | 0.76x (600 to 456 mm, f/5.7) |
| Optics | 3 elements, including 1 ED glass element |
| Video coverage | full-frame |
| Assembly | M68 flange of the FF80 APO |
| Filter thread | 2 inch (M48 x 0.75), built-in |
| Outputs | M48 x 0.75 to M54 x 0.75 |
The reducer that the FF80 APO from ZWO transforms into a fast widefield astrograph.
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