Pentax S-Series Superior SP 8x40mm WP Full Size Porro Prism Binocular Black. Pentax SP series binoculars feature multi-layer coatings for enhanced light transmission and O-Coating for spherical distortion reduction. And their large objective lens gathers a tremendous amount of light to ensure you can see even in low light conditions. Pentax 's porro prism binocular's ensure a steady image and sharp focus even in difficult weather conditions (JIS Class 5). And their waterproof and nitrogen-filled construction makes them able to handle the most extreme weather conditions (submersible to 1m). These Pentax SP Binoculars feature a rigid body construction that makes them extremely rugged to maintain optical alignment. And they are filled to within 1 percent tolerance. So they deliver consistent performance even after years of use. Pentax offers the industry's most comprehensive binocular protection program. Whether you need a waterproof binocular or a barometric altimeter Pentax has you covered. Pentax S-Series Superior SP 8x40 Waterproof & Fogproof Binoculars meet ISO standards for performance and are backed by the company's limited lifetime warranty. Pentax S-Series Superior SP 8x40 Full Size Binoculars are the only premium grade binoculars that Pentax sells. Specifications for Pentax S-Series Superior SP 8x40 Full Size Binocular: Manufacturer: Pentax Color: Black Magnification: 8 x Objective Lens Diameter: 40 mm Prism System: Porro Prism Material: BAK4 Eye Relief: 13 mm Exit Pupil: 5 mm Field of View Linear: 143.5 m at 1000 m 430 ft at 1000 yds Field of View Angle: 8.2 degrees Optical Coating: Fully Multi-Coated Binoculars Focus System: Center Focus Twilight Factor: 25 Interpupillary Distance: 57 - 72 mm Close Focus: 11.5 ft Diopter Adjustment Range: -2 - 2 dpt Weather Resistance: Yes Water Resistance Level: Waterproof Length: 5.4 in Weight: 31.75 oz Finish: Black Package Type: Box Included Accessories: Eyepiece lens caps Case Neck Strap Magnification Type: Fixed Size Class: Full Size Features of Pentax S-Series Superior SP 8x40 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 8x40 Full Size Binocular Pentax 65871: S-Series Superior SP 8x40 WP Full Size Binocular Black 65871