Celestron upclose 8x40 porro
Universal binocular area of use nature travel magnification 8 x lens diameter 40 mm prism system porro exit pupil diameter 5 mm min focus distance 488 m angle of view 82 field of view in 1000 m 143 m twilight factor 179 relative brightness 25 viewing binocular straight weight 680 g outdoor function waterproof