Pentax U-Series Papilio II 8.5x21mm Porro Prism Binoculars Black. 5x21 Binoculars excels at close-up viewing with its Convergent Lens Optical System Engineering (CLOSE) mechanism that offers optimized close-range viewing down to 1.6ft. Pentax crafted these Binoculars with fully multi-coated optics for enhanced brightness and clarity in any conditions while minimizing glare. This Pentax U-Series Papilio II 8.5x21mm Center Focus Binocular features a unique Uni-body design that's incredibly durable and built to last a long time thanks to fewer moving parts. Grab the Pentax U-Series Close-Range Papilio II 8.5x21 Binoculars to take a closer look at the wildlife you encounter. Specifications for Pentax U-Series Papilio II 8.5x21mm Porro Prism Binoculars: Manufacturer: Pentax Color: Black Magnification: 8.5 x Objective Lens Diameter: 21 mm Prism System: Porro Prism Material: BAK4 Eye Relief: 15 mm Exit Pupil: 2.5 mm Field of View Linear: 315 ft at 1000 yds 32 m at 1000 m Field of View Angle: 6 degrees Optical Coating: Fully-Multi Coated Binoculars Focus System: Center Focus Twilight Factor: 6 Interpupillary Distance: 56 - 74 mm Close Focus: 1.6 ft Diopter Adjustment Range: -4 - 4 dpt Water Resistance Level: None Length: 4.6 in Weight: 10.2 oz Finish: Black Package Type: Box Additional Features: Compact Binocular Included Accessories: Eyepiece lens caps Case Neck strap Magnification Type: Fixed Blade Material: Rubber Features of Pentax U-Series Papilio II 8.5x21mm Porro Prism Binoculars New fully multi-coated optics Close focus to 50cm for macro observation unique in the market Aspherical lens elements providing edge-to-edge sharpness High Quality BaK4 prism to enhance transmission and resolution Dual-axis single body housing with synchronized eye-piece IPD adjustment Rubber covered body provides protection and grip Twist-up eyecups Fine diopter adjustment and fast and easy central fine-focusing Package Contents: Pentax U-Series Papilio II 8.5x21mm Porro Prism Binoculars Pentax 62002: U-Series Papilio II 8.5x21mm Porro Prism Binoculars Black