ZWO FF131 - 131mm f/7.5 Flat Field APO Refractor - FF131-APO Wanderer Rotators Amplify Control

Amplify Control

and your eyepiece from falling should it accidentally loosen from the focuser

Die-cast aluminum body

GENERAL Lens Design: Double-Gauss Aperture: 28mm (1

This product features an amazing compression ring technology which not only protects your eyepieces

ZWO FF131 - 131mm f/7.5 Flat Field APO Refractor - FF131-APO Wanderer Rotators Amplify ControlZWO FF131 APO Flat Field Apochromatic Refractor Main Features Flexible Connectivity for Multiple Configurations Four Element Optical Design The FF131 APO features a four element, fully air spaced apochromatic optical design. All four elements work together to deliver a flat imaging field without the need for an additional field flattener. One ED (extra low dispersion) glass element is incorporated to effectively reduce chromatic aberration, resulting