Also in the binoculars put on the market in 19 mm in thickness / mass of 65 g (weight), and NIKON, since the thinnest and magnification 4 times the lightest-weight binoculars of this also have little influence of camera shake and their real field of view is large, by indoor playgoing, the whole stage can be enjoyed comfortably. ●The NIKON binoculars in history, the thinnest (19 mm in thickness) and a light weight (mass of 65g) ●The flat body without unevenness is convenient to carry. ●the structure which excluded the "visibility adjustment mechanism" -- easy operation of only interpupillary-distance adjustment and focus adjustment