ZWO FF107 107 mm F/7 Quadruplet Flatfield

Codice articolo: ZWO-FF107-APO

The FF107 is a transportable APO refractor for astrophotography with corrected field of view up to full frame sensor and for observation up to the highest magnification range.

♦ Aperture 107 mm - focal length 740 mm - focal ratio f/7

♦ 4-element Petzval system with color-correct triplet objective and a corrector lens built into the optical tube

♦ Stable 3.4" RAP focuser with micro-reduction and 360° rotation - adjustment range 110 mm

♦ Sufficient working distance for observing with 2" accessories and for photography

♦ Besides 1.25" and 2" the apo offers M48, M54, M68 and M86 threads for screw adaptions

♦ 44 mm image circle with full illumination and correction allow the use of large sensors with high resolution

♦ CNC tube rings with Vixen/EQ5 style dovetail bar and carrying handle

♦ Finder shoe for standard finder and mini guiding telescopes available

♦ High quality carrying case for optimal protection of the telescope

♦ Each Quadruplet Apo is inspected and its optics tested before shipping - you get an optimally adjusted telescope for successful photography and observation from the very beginning.

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 it 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 1:7 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-stemming 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 cap, a high-quality CNC-machined and painted tube, and decoratively designed parts. The OTA weighs 5.7 kg, and the total package with tube clamps, 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

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