Monocular zoom binoculars area of use nature travel bird watching magnification 12 x lens diameter 30 mm zoom factor 2 times suitable for intermediate expert min focus distance 2 m angle of view 56 field of view in 1000 m 98 m twilight factor 134 focussing system individual focus viewing straight binocular monocular weight 299 g special features rubber armouring water resistant format compact prismenglas bak 4