XR anti-reflective coatings team up with XD extra-low dispersion glass for images that are bright, crisp, and sharp Dual focus wheel allows for maximum focusing precison with both coarse and fine focus adjustments. Eyecup twists up and down for comfortable viewing with or without glasses Rotating tripod ring allows rotation of the eyepiece to a sideways position. Sunshade reduces glare and shields the objective lens from rain and snow