66 degree AFOV perfects for broad field lunar observations;medium sized star clusters;wide range of cloudy nebulas and deep sky targets with extra sharpness Aluminum 1.25" eyepiece barrel is internally blackened to eliminate light scattering and is threaded to accept 1.25" filters Edge blackened optics;internally blackened to eliminate light scattering;minimize internal reflection and maximize contrast Multi group lens combination to improve optical performance;the eyepieces sets delivers sharp images with good color correction and contrast Fully multi coated broadband green optics with superior optical performance;clarity is great and the magnification is truly represented