Compact binoculars area of use bird watching nature travel magnification 8 x lens diameter 25 mm prism system porro exit pupil diameter 31 mm min focus distance 25 m angle of view 63 field of view in 1000 m 110 m twilight factor 141 focussing system central focus viewing straight binocular weight 270 g included in delivery pouch lanyard special features for spectacle wearers rubber armouring