Zoom binoculars area of use watersports magnification 12 x lens diameter 70 mm zoom factor 3 times prism system porro exit pupil diameter 583 mm angle of view 32 field of view in 1000 m 56 m twilight factor 29 relative brightness 33 99 focussing system central focus viewing straight binocular weight 1 490 g included in delivery pouch shoulder strap tripod adapter special features rubber armouring