Outdoor binoculars ed extra low dispersion hawke worldwide warranty area of use bird watching travel nature outdoor sports magnification 10 x lens diameter 43 mm prism system roof suitable for beginner intermediate exit pupil diameter 43 mm min focus distance 2 m angle of view 646 field of view in 1000 m 113 m twilight factor 207 relative brightness 18 49 focussing system central focus viewing straight binocular coating fully multi coat