Pentax S-Series Superior SP 12x50mm Full Size Porro Prism Binocular Black. Ruggedly styled with a full-rubber housing including the extra large central focusing wheel. They feature exceptional optical performance. The S-series consists of both roof and porro prism models with objective lenses > 40mm so personal preferences are immediately defined. In addition to the newly developed light transmission coatings waterproof porrro prism models also boast the hydrophobic coating thereby allowing for contrast-rich bright viewing under rough outdoor conditions. Specifications for Pentax S-Series Superior SP 12x50 Full Size Binocular: Manufacturer: Pentax Color: Black Magnification: 12 x Objective Lens Diameter: 50 mm Prism System: Porro Prism Material: BAK4 Eye Relief: 20 mm Exit Pupil: 4.2 mm Field of View Linear: 73.5 m at 1000 m 220 ft at 1000 yds Field of View Angle: 5.6 degrees Optical Coating: Fully Multi-Coated Binoculars Focus System: Center Focus Twilight Factor: 17.4 Interpupillary Distance: 57 - 72 mm Close Focus: 18 ft Weather Resistance: Yes Water Resistance Level: Waterproof Length: 7 in Weight: 38.4 oz Finish: Black Package Type: Box Included Accessories: Neck Strap Eyepiece lens caps Case Magnification Type: Fixed Size Class: Full Size Features of Pentax S-Series Superior SP 12x50 Full Size Binocular 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 Superior SP 12x50 Full Size Binocular Pentax 65904: S-Series Superior SP 12x50 Full Size Binocular Black