Product Info for Pentax Z-Series Premium ZD 10x50 ED Binocular Offering the ultimate level of optical and build quality to achieve a brilliant view of your subject. Specifications for Pentax Z-Series Premium ZD 10x50 ED Binocular: Color: Green Magnification: 10 x Objective Lens Diameter: 50 mm Prism System: Roof Prism Material: BAK4 Eye Relief: 22 mm Exit Pupil: 5 mm Field of View, Linear: 26.5 m at 1000 m Field of View, Angle: 5 degrees Optical Coating: Protective Coated, New Premium level lens Coated, Fully Multi-Coated, Full-color (Flat) Multi-Coated Binoculars Focus System: Center Focus Twilight Factor: 25 Interpupillary Distance: 58 - 74 mm Close Focus: 6.6 ft Diopter Adjustment Range: -3 - 3 dpt Weather Resistance: Yes Length: 6.7 in Weight: 30.2 oz Finish: Green Package Type: Box Additional Features: ED WP Full Size Binocular Included Accessories: Neck Strap, Case, Eyepiece lens caps Magnification Type: Fixed Features of: Extra Low-Dispersion Glass Phase-Corrected BAK4 Roof Prisms Hybrid Aspherical Lens Elements Fully Multicoated Optics Angle of View: 50degrees Nitrogen-Filled, Water and Fogproof Closed Bridge Configuration Magnesium Alloy Chassis Tripod Mountable Twist-Up Eyecups