ZWO FF107 107 mm f/7 Quadruplet Flatfield Super APO Astrograph

ZWO 107 mm f/7 APO Astrograph

The FF107 is a flatfield astrograph that joins the series that also includes the FF65, FF80 and FF130 models.

Optical Design

Instead of buying additional flatteners, calculating the back focus of the flattener, or making a tedious connection to set the correct distance, astrophotographers can simply equip the apochromat with all sorts of photographic accessories, hold the object in focus, and then the entire optical system is perfectly set for imaging.

High quality glass

The FF107 has a focal ratio of f/7 and a focal length of 740 mm. The FF107 is a quadruplet design with two ED glasses, which provides excellent control of chromatic and other aberrations. With its self-flattening design, the FF107 offers great advantages in astronomical imaging. It offers more than full-frame image circle and has a fine spot diagram with only tiny distortions of peripheral stars.

Practical Details

The FF107 comes with a retractable dew shield, a high-quality CNC-machined and painted tube, and decoratively designed parts. The OTA weighs 5.7 kg, and the total package with tube rings, etc. weighs 6.9 kg. The sturdy 3" focuser comes with a 360° rotator with scales and a finder shoe. M76, M68, M54 and M48 camera adapters are also included, and the M48 adapter has a female M48 thread for installing 2" filters.

The back focus is always measured with the focuser tube completely retracted:

79 mm from M48x0.75 male thread

99 mm from M54x0.75 male thread

119 mm from M68x1 male thread

149 mm from M86x1 male thread

120 mm from 2" connection