Great hand held zoom monocular providing zoom from 10x to 120x power with microscope attachment that gives you a zoom microscope from 50x to 200x. Multi coated optics with BAK4 roof prism, 30mm achromatic objective has a clear diameter of 25mm. Includes lighted achromatic microscope attachment (takes 2 LR44 batteries, included) which by itself is a 2x loupe.. Has tripod mount and adjustable eyeguard. Nice wide Field of view at 3.8 degrees for 10x and 2 degrees for 120x. Compact size only 5 inches long. This is a super 3 in one optical tool. Unused.