Zeiss Terra ED 10x42 Binoculars Magnification: 10x Objective lens diameter: 42mm Light transmission: 88% ED optical system Prism system: Schmidt-Pechan Apparent angle of view: 60 Zeiss anti-reflective hydrophobic multicoating Large fast-focus center wheel Fiberglass reinforced casing Textured rubber grip armor Twist-up locking eyecups Nitrogen purged Water resistance: 100mbar Field of view: 330 ft. @ 1000 yds. (110m @ 1000m) Exit pupil: 4.2mm Eye relief: .55" (14mm) Close focusing distance: 5.3 ft. (1.6m) Diopter adjustment range: -3 / +3 dpt Interpupillary adjustment range: 2.28"-2.97" (58-75.5mm) Length: 5.6" (142mm) Width: 4.7" (120mm) @ 2.56" (65mm) interpupillary distance Weight: 25.6oz (725g) Operating temperature: 5-140F (-15-60C) Zeiss Transferable Limited Lifetime Warranty Includes neoprene strap, zippered Cordura case, instructions, eyepiece covers