ZWO 0.7x Reducer for FF107 and FF130 Refractors

ZWO 0.7x Reducer for FF107 and FF130 Refractors

Description:
The ZWO 0.7x focal reducer is an advanced optical accessory designed specifically for the FF107 (107 mm, F/7) and FF130 (130 mm, F/7.7) ZWO apochromatic refractors. It not only shortens the focal length but also acts as a field flattener, delivering pinpoint stars across the entire imaging field.

With the FF107, focal length drops from 749 mm to 524 mm (F/4.9). With the FF130, it goes from 1000 mm to 700 mm (F/5.4). This translates into a faster imaging system and a wider field of view—perfect for deep sky photography.

The reducer consists of three optical elements, including one ED (Extra-low Dispersion) glass element, and is fully multi-coated on all surfaces to reduce reflections and enhance light transmission.

Mechanically, it inserts directly into the 80 mm focuser drawtube of the FF telescopes. On the camera side, it features a male M68 x 1 mm thread and includes two adapter rings to switch to M54 x 0.75 mm or M48 x 0.75 mm. The recommended backfocus is 55 mm from the M48 thread.

Technical specifications:

• Reduction factor: 0.7x

• Optics: 3 elements, one ED glass

• Coating: fully multi-coated on all surfaces

• Compatibility: FF107 (F/7) and FF130 (F/7.7)

• Resulting focal length: FF107 → 524 mm (F/4.9), FF130 → 700 mm (F/5.4)

• Drawtube diameter: 80 mm

• Length: ~80 mm (excluding threads)

• Telescope side thread: M77 x 1 mm female

• Camera side thread: M68 x 1 mm male

• Adapter ring 1: M68 female to M54 male (7 mm thick)

• Adapter ring 2: M54 female to M48 male (7.5 mm thick)

• Recommended backfocus: 55 mm from M48

Additional information:

• Includes field correction for edge sharpness

• Only compatible with ZWO FF107 and FF130

• Enhances wide-field imaging and shortens exposure time

• Multiple thread interfaces: M48, M54, and M68

• Rugged construction with professional-grade coatings