Gosky 6mm 1.25inch WA66&deg; Ultrawide Eyepiece for Telescopes - Threaded for Standard 1.25inch Astronomy Filters 1.25 inch 6mm WA66 Urtrawide Eyepiece , gives the wide 66 degree viewing field (AFOV) along with extra sharpness and long eye relief . Perfect for broad-field lunar observations, medium-sized star clusters, and a wide range of cloudy nebulas and deep-sky targets Fully-multicoated optics. These are quite attractive with a sleek black body, bright chrome barrels, and gold top ring. Threaded for standard 1.25inch astronomy filters. There are 6mm,9mm,15mm,20mm models in this series.All of the eyepieces in this series have an apparent field of view (AFOV) of 66.