10x42 EXPS I Features:Professional Binoculars 10x magnification High index BaK-4 porro prisms for bright, crisp edge-to-edge images Fully multi-coated lenses for maximum image brightness and contrast Long eye-relief with twist-up/down eyepieces Non-slip rubberized coating and grips for a sure hold New ergonomic, contoured design UV coating for care-free viewing Large, centre-focus knob for fast and easy focusing Built-in dioptric correction adjusts to individual eyesight Size W x H x D (mm): 187 x 130 x 57 Weight: 785 g Specifications Type: Porro-prism type binoculars. Magnification: 10× Objective lens diameter: Ø 42 mm Exit pupil diameter: Ø 4.2 mm Actual field of view: 5.5° Apparent field of view: 55.0° Field of view at 1000 m: 96.1 m Eye relief: 18.4 mm Diopter adjustment range: Over ±2 m-1 Eye interval adjustment range: 60–70 mm Relative brightness: 17.6 Closest focal point: 5 m Width (fully extended): 187 mm Height: 130 mm Depth (fully extended): 57 mm Weight: 785 g Optical coating: Full multi-coating, UV coating. Lens configuration: 8 elements in 6 groups. Other: Long eye relief and adjustable eyepieces (twist up/down). High-index BaK4 prisms. Environmentally friendly lead-free glass.Box Contents All OLYMPUS binoculars come complete with case, neckstrap and protective lens covers.