ZWO FF80 APO Refractor Telescope with FREE F80RE Focal Reducer!
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Wow! The ZWO FF80 is substantially discounted through the end of the year AND you'll get a free F80RE 0.75X Focal Reducer! Hurry, the sale ends January 3, 2025.
The ZWO FF80 APO is a f/7.5 APO refractor with a flat-field optical design...there is no need to add a field flattener to this system! It is a pleasure to work with a system that does not require a separate field flattener; it eliminates the hassle of calculating the back focus distance and figuring out which spacers you require to achieve that distance for best focus. Just add any accessories you need, focus carefully, and start shooting!
The FF80 has a 3+1 quadruplet lens structure. The APO optics includes two ED lenses to effectively reduce chromatic aberration and enhance clarity and sharpness. This 80 mm refractor supports full-frame imaging. It comes with a 3" dual-speed focuser that sports a 360-degree rotator and comes with a 2" & 1.25" adapter. M76, M68, M54 & M48 camera adapters are included, and the M48 adapter has a 2" female thread for installing filters.
The telescope OTA is white with red accents, and is CNC machined and anodized for strength and beauty. A build in lens hood slides forward when you need protection from stray light and dew, but can be locked into place with thumb screws if you want to keep it from moving.
Perfect for Visual Use
The ZWO 80mm Quad Refractor is a nice choice for visual observations. With its portable form factor, you can easily take it with you to star parties, on camping trips, or when traveling. The FF80 accepts diagonals, eyepieces, and other visual accessories, and comes to perfect focus, unlike telescopes out there that can only be used for imaging. The body weights just 3.9kg, or 8.6 pounds, and even when you add the tube rings, handle, and dovetail the whole system weighs 4.7kg, or 10.4 pounds!
A Dream Scope for Imaging
Besides offering a flat field and great correction for chromatic aberration, the ZWO F80 supports full frame imaging with an image circle of 44 mm. Stars are small and round with a central RMS radius of 3um.
Included Accessories
The ZWO FF80 comes with a beautiful red dual cradle ring with a handle on top. the handle has a slot for attaching a guidescope or other accessories. The cradle ring can easily be detached and re-attached in no time. The FF80 ring attaches to a Vixen-style dovetail, which will fit into the Vixen saddle of a wide variety of mounts.
A variety of camera adapters (M76, M68, M54 & M48) are included, and the M48 adapter has a female thread for installing 2" filters. For DSLR imaging, a camera specific 48mm T-Ring is required, and is sold separately.
About the FF80 Focal Reducer...
The ZWO 3" 0.76× Full Frame Reducer is designed specifically for the FF80 APO refractor. It has a reduction factor of 0.76X, which shortens the effective focal ratio to f/5.7 for a wider field of view and shorter image acquisition times. The reducer has a three-element optical design with one extra-low dispersion (ED) element and will work with full frame cameras.
The back focus distance is the standard 55mm. The reducer connects to the refractor by taking the place of the four-segment camera extension tube that comes with the FF80. It comes with a built-in M48x0.75 2” filter thread.
Connection steps
- Prepare the FF80 APO telescope tube and the focal reducer.
- Unscrew the four-segment extension tube at the end of the FF80 APO telescope tube. Place somewhere safe.
- Unscrew the end cap of the 0.76X reducer.
- Insert the reducer into the focuser and tighten.