Astronomy binoculars area of use astronomy magnification 25 x lens diameter 70 mm prism system porro exit pupil diameter 28 mm min focus distance 229 m angle of view 25 field of view in 1000 m 43 m twilight factor 418 relative brightness 7 84 viewing binocular coating multi coated weight 1 474 g included in delivery pouch tripod adapter outdoor function waterproof prismenglas bak 4