Endeavor ED 8320 ED glass technology for superior color reproduction. Contemporary open-bridge body design. Large Focus wheel . Memorable right-eye diopter settings and 3-stops eyecups . Light weight durable Magnesium alloy body. Extra low-dispersion (ED) glass technology for superior color reproduction Large view angle and minimum near focus Ergonomic Center Focus Wheel Memorable right-eye diopter settings and Adjustable 3 stage twist-out eye cups Light weight durable Magnesium alloy body