Universal binocular perfect for older kids and adults includes rspb pin and bird identification guide 1 year warranty area of use nature bird watching travel magnification 8 x lens diameter 32 mm prism system porro exit pupil diameter 4 mm min focus distance 25 m angle of view 75 field of view in 1000 m 131 m twilight factor 16 relative brightness 16 focussing system central focus viewing straight binocular weight 500 g eye relief 14 incl