Gosky 20mm 1.25inch Plossl Telescope Eyepiece - 4-Element Plossl Design - Threaded for Standard 1.25inch Astronomy Filters 1.25 inch 20mm plossl eyepiece, gives the widest viewing field along with extra sharpness and long eye relief 4-element plossl design, has a approx 52 degree AFOV. Perfect for broad-field lunar observations, medium-sized star clusters, and a wide range of cloudy nebulas and deep-sky targets Comes with sturdy plastic case-proect the eyepiece from dust and moisture Threaded for standard 1.25inch astronomy filters and barlow lens