ZWO FF107 F/7 Apochromatic Refractor with 3.4" Rotating Focuser

ZWO FF107 F/7 Apochromatic Refractor with 3.4" Rotating Focuser

Description:

The ZWO FF107 is a high-performance apochromatic refractor featuring a 107 mm aperture and 750 mm focal length. Its quadruplet design includes a front triplet objective with two ED (Extra-low Dispersion) glass elements and an integrated rear field flattener, providing a perfectly flat 44 mm image circle—ideal for full-frame astrophotography sensors.

Designed for both high-resolution imaging and observation, the FF107 excels in visual clarity and chromatic correction. It offers crisp views of the Moon, Saturn’s rings with the Cassini Division, Jupiter’s cloud belts and Great Red Spot, Venus’ phases, and numerous deep-sky objects. A good Barlow lens enhances its planetary performance.

In astrophotography, it delivers sharp, contrast-rich images with pinpoint stars across the field. The flat imaging plane makes it a perfect match for large nebulae, galaxy fields, and open clusters.

Its 3.4" rack & pinion focuser, mounted on a linear rail and equipped with 1:10 micro-fine adjustment, ensures excellent stability and focusing precision. A 360° rotator at the focuser’s rear helps framing the target object easily.

The retractable dew shield reduces transport size to 603 mm. The optical tube is equipped with a Vixen-type dovetail, an ergonomic carrying handle, and six screw-on adapters (M48, M52, M54, M68), plus a 2" to 1.25" visual reducer.

Warranty: 1 year (ZWO)

Technical specifications:

• Aperture: 107 mm

• Focal length: 750 mm

• F-ratio: F/7

• Optical design: quadruplet with ED triplet and rear corrector

• Image circle: 44 mm

• Retractable dew shield (outer diameter 138 mm)

• Transport length with retracted dew shield: 603 mm

• Focuser: 3.4" Rack & Pinion with 1:10 micro reducer, 360° rotator

• Drawtube travel: 105 mm

• Rear thread: M86 x 1 mm

• Included adapters: M68, M54, M52, M48, 2", 1.25"

• Dovetail: Vixen-style, 43 mm width, 300 mm length

• Optical coating: fully multi-coated

• Weight: 6.9 kg

• Resolving power: 1.12"

• Limiting magnitude: 12.1

• Light gathering power: 318x

Additional information:

The ZWO FF107 is ideal for astrophotographers using full-frame sensors and seeking maximum field flatness with pinpoint star images. The large aperture and quality ED optics ensure high contrast, minimal chromatic aberration, and excellent sharpness across the frame.

Its mechanical structure is robust and transport-friendly, with a retractable dew shield, carrying handle, multiple mounting points, and universal threaded interfaces. The 3.4" focuser handles heavy imaging equipment with ease and stability. A premium choice for deep-sky imaging and detailed planetary work.