Sky-Watcher 0.9× Reducer / Field Flattener for Evolux-62ED — 20111

The Sky-Watcher 0.9× Reducer / Field Flattener is a dedicated optical accessory designed specifically for the Evolux-62ED refractor. Combining a 2-element design with one ED element, it both reduces focal length and corrects field curvature, delivering sharper stars right to the edge of the frame — ideal for wide-field astrophotography.

When fitted, it reduces the Evolux-62ED’s focal length by a factor of 0.9×, producing a fast, wide field system optimised for imaging.

Faster system, wider field

With the reducer installed, the Evolux-62ED becomes:

• Focal length: 360mm

• Focal ratio: f/5.8

• Field of view: approx. 5.09°

This faster setup allows shorter exposure times and wider framing, making it perfect for large nebulae, star fields and night-scape compositions.

Flat, well-corrected image across the sensor

The integrated field flattener ensures pinpoint stars across a 30mm image circle, illuminating a full-frame format and minimising distortion toward the edges — a key benefit for DSLR and dedicated astro cameras.

High-quality construction and coatings

• Fully multi-coated optics for maximum light transmission

• Precision-machined housing

• Smooth-threaded connections for secure alignment

Flexible connection options

Supplied with an adapter / field rotator, the reducer offers practical mounting versatility:

• M56×1 female and M48 male threads

• Internal thread for 2" filters

• Standard 55mm back focus

• Compatible with Sky-Watcher M48 Canon and Nikon T-rings

This makes it easy to integrate into most imaging trains while maintaining the correct spacing.

The Sky-Watcher 0.9× Reducer / Field Flattener for Evolux-62ED (20111) is a superb upgrade for anyone looking to optimise their Evolux imaging performance — delivering faster optics, flatter fields and beautifully sharp, wide-field results.