The newest ZWO Full Frame Reducer lineup comes in several iterations designed specifically for ZWO apos.
The FF65APO 0.75× full frame reducer integrates with the ZWOFF65APO. This ZWO Full Frame Reducer offers a four-element optical design and has a reduction factor of 0.75x, which gives the ZWOFF65APO 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 simple and convenient.
ZWO has also released a new 3-inch FF80APO 0.76X full frame reducer with a three-element optical design, including one element made of ED glass. Its reduction factor is 0.76x, which gives the ZWO FF80APO f/7.5 astrograph a shortened focal ratio of f/5.7 and a shorter focal length of 312mm.. The reducer has a rear interface that attaches to the FF80APO telescope tube’s included four-segment camera extension tube. The back focus is the standard 55mm and it has a built-in M48X0.75 2-inch filter thread for attachment.
ZWO also now offers a 3-inch 0.7× full frame reducer that is compatible with the ZWO FF107APO telescope. It has a three-element optical design, including one element made of ED glass. Its reduction factor is 0.7, which gives the FF107APO a shortened focal ratio of f/4.9 and a shorter focal length of 524mm. The reducer has a standard 55mm back focus and comes with M68, M54, and M48 threaded adapters for easy attachment.
You can learn more about the ZWO Full Frame Reducer lineup here.
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