Silva 8x21 pocket
Compact binoculars area of use golf travel theatre magnification 8 x lens diameter 21 mm prism system roof exit pupil diameter 263 mm min focus distance 4 m angle of view 75 field of view in 1000 m 131 m twilight factor 13 relative brightness 6 92 focussing system central focus viewing binocular straight weight 175 g