XCF 8X40 The PENTAX 8x40 XCF binocular combines outstanding optical performance with exceptional value. With a generous 429 foot field of view, high-quality BaK4 prisms, and multi-coated optical elements, this ruggedly-styled binocular provides excellent image quality and light transmission and is ideal for almost any application. Take your binocular anywhere. The PENTAX 8x40 XCF features a finely constructed porro-prism design and full-body rubber housing to protect the internal mechanisms and optical elements from shock and damage. A black finish adds a distinctive, attractive appearance. See your images more clearly. PENTAX smc optics eliminate harmful ultraviolet rays and improves light transmission for high contrast images with no glare or flare. Focus on your subject quickly and easily with a center-focus system that allows accurate and speedy focusing with simple fingertip control. Adjust the image for your eyesight. Incorporated in the right eyepiece ring, the diopter adjustment allows near- and far-sighted viewers to easily and quickly adjust the image to match their eyesight. Wear your eyeglasses. The PENTAX XCF series features eyepiece rings made of soft but durable rubber material that can be easily folded back to make image viewing easier for eyeglass wearers. View your subjects even in dim light with high-quality BaK4 prisms that transmit more light at the edges to enhance illumination. Make extended observations easy and more comfortable by combining the built-in tripod socket with a tripod and an optional Tripod Adapter-TP3 to stabilize the binoculars and prevent unwanted shake. The PENTAX XCF series is protected by a limited lifetime warranty. Specifications for XCF 8X40 Binocular Type: Porro prism, center focusing Lens Construction: Objective Lens: 2 elements in 1 group; Eyepiece Lens: 3 elements in 2 groups Coating: Super-multi-coating Magnification: 8X Objective Lens Diameter: 40mm Real Field Of View: 8.2 degrees Apparent Field Of View: 66 degrees Field Of View At 1000 Meters: 143m Field Of View At 1000 Yards: 429 ft. Exit Pupil: 5.0mm Eye Relief: 13mm Prism: Porro Multi Layer Coating: Yes Minimum Focusing Distance: 20 ft. Relative Brightness: 25 Diopter Adjustment Range: +/- 3 m -1 Eye Distance Adjustment Range: 2.3 - 2.8" Focusing Range: 20 ft. - infinity Eyepiece Ring: Collapsible Body Color: Black Height Width: 5.1 x 7.4" Thickness: 2.2" Weight: 27.2 oz. Waterproof: No Accessories: Objective Lens Cap, Eyepiece Lens Cap, Case, Neck Strap