Sky-Watcher UWA Planetary series 1.25 inch (31.7mm) eyepiece. UWA Planetary series eyepieces are ideal when high magnification is required for the observation of fine planetary and lunar detail. Based on a modified Plossl design, these fully multi coated eyepieces are constructed with five lens elements, and are characterised by their wide 58 degree field of view, low distortion, high contrast performance and comfortable operation. Each model features fold down / screw off rubber eyecups and a generous 16mm eye relief