Delta Optical Discovery 12x50 Binoculars Delta Optical. Discovery 12x50 Binoculars Discovery binoculars are lightweight, mid-sized binoculars with a durable construction. The rubberized body provides shock absorption in the event of impact with a hard object or surface. The housing houses lenses constructed from 8 elements in 12 groups, which are multi-coated with effective anti-reflective layers. Wide eyecups and large eyepiece lenses make every observation a pleasure. Discovery 12x50 binoculars feature 12x magnification, which seems to be the optimal magnification for hiking binoculars. This makes distant objects even closer and clearer. They have a smaller field of view. Binoculars with these parameters are ideal for daytime nature observations and viewing distant landscapes. Technical specifications: Objective diameter: 50 mm; Magnification: 12x; Prism system: Porro; Optical design: 12 elements / 8 groups; Exit pupil: 4.2 mm; Eye relief: 15 mm; Field of view: 5.5 degrees; Linear field of view (1000 m): 96 m; Minimum close focus: 7 m; Relative brightness: 17.6; Twilight efficiency: 24.6; Focusing: central; Diopter adjustment: on the right eyepiece; Interpupillary distance: 56 -72 mm; Dimensions: 189 x 178 x 65 mm; Weight: 896 g; .