The Sky-Watcher Planetary 9mm UWA Eyepiece is ideal when high magnification is required for the observation of fine planetary & lunar detail. Based on a modified Plossl design, this fully multi-coated eyepiece is constructed with five lens elements, & is characterised by its wide 58 degree field of view, low distortion, high contrast performance & comfortable operation. There are other Sky-Watcher Planetary UWA eyepieces available in 2.5mm, 4mm, 5mm, & 6mm focal lengths. Each model features rubber grips, fold down/screw-off rubber eyecups, a generous 16mm eye relief for spectacle wearers & 1.25"" threaded barrels for attaching filters.