The Granite 10x42 Binocular from Celestron features fully multicoated lenses and BAK4 roof prisms for maximum contrast and color rendition. ED glass delivers edge-to-edge sharpness with excellent color correction and razor sharp images while virtually eliminating chromatic aberration. It has a wide 65° Apparent Angle of View. This Granite's open-frame construction provides a lightweight yet rugged form-factor, comfortable handling, and a contemporary look. The magnesium body is rugged and tough for handling in any environment. With or without eye or sunglasses, a comfortable fit is made possible by substantial eye relief.