Pentax S-Series SP 10x50mm Porro Prism Binoculars Full Size Black. Pentax constructed these Binoculars with a large objective lens that amplifies light transmission for bright views even in low-light environments and there are special coatings that repel dust water and grease to keep your glass clean for extended viewing sessions. The Pentax S-Series Superior SP 10x50mm Waterproof Full Size Binocular is also filled with nitrogen for fogproof performance even in harsh conditions. Clearly sight out distant targets while wielding this powerful Pentax S-Series Superior SP 10x50 Porro Prism Full-Size Binocular. Specifications for Pentax S-Series SP 10x50mm Porro Prism Binoculars: Manufacturer: Pentax Color: Black Magnification: 10 x Objective Lens Diameter: 50 mm Prism System: Porro Prism Material: BAK4 Eye Relief: 20 mm Exit Pupil: 5 mm Field of View Linear: 112 m at 1000 m 336 ft at 1000 yds Field of View Angle: 5 degrees Optical Coating: Fully Multi-Coated Binoculars Focus System: Center Focus Twilight Factor: 25 Interpupillary Distance: 57 - 72 mm Close Focus: 18 ft Diopter Adjustment Range: -2 - 2 dpt Weather Resistance: Yes Water Resistance Level: Waterproof Length: 7 in Weight: 37.4 oz Finish: Black Package Type: Box Included Accessories: Case Neck Strap Eyepiece lens caps Magnification Type: Fixed Size Class: Full Size Features of Pentax S-Series SP 10x50mm Porro Prism Binoculars New fully multi-coated optics Durable aluminum die cast body For spectacle wearers: soft rubber eyecups that can easily be folded back Click-stop diopter adjustment Package Contents: Pentax S-Series SP 10x50mm Porro Prism Binoculars Pentax 65903: S-Series SP 10x50mm Porro Prism Binoculars Full Size Black