Barska Colorado 10x50mm Porro Prism Binoculars Black. Featuring 10x magnification and 50mm fully coated objective lenses for sharp and crisp images. Dry nitrogen-purged and sealed to prevent fogging clouding and moisture damage and O-ring sealed for 100percent waterproof protection. Rubber armor covering protects them from harsh weather conditions and detachable lens covers are included for added protection. Twist-up eyecups allow you to view with or without eyeglasses. Accessories include complete with neck strap and soft carrying case. Specifications for Barska Colorado 10x50mm Porro Prism Binoculars: Manufacturer: Barska Color: Black Magnification: 10 x Objective Lens Diameter: 50 mm Prism System: Porro Prism Material: BK-7 Image Stabilizer: No Eye Relief: 12.7 mm Exit Pupil: 4 mm Field of View Linear: 367 ft at 1000 yds Optical Coating: Fully Coated Binoculars Focus System: Center Focus Twilight Factor: 22.36 Close Focus: 19.6 ft Weather Resistance: None Length: 6.89 in Weight: 28.8 oz Included Accessories: Lens Cloth Lens Covers Carrying Case Neck Strap Magnification Type: Fixed Tripod Adaptable: Yes Case: Yes Eyecups Types: Fold Down Armoring: Rubber Armored Compass: No Housing/Frame Material: Aluminum Zoom: No Nitrogen Filled: No Strap: Yes Brightness Index: 16 Size: Small Features of Barska Colorado 10x50 Binocular: Magnification: 10x Objective Lens: 50mm Prism Type: Porro Prism Glass: BK-7 Exit Pupil (mm): 4mm Optical Coating: Fully Coated Focusing System: Center Field of View (ftat1000yds/mat1000m): 367/122 Close Focus Distance(ft/m): 19.6/6 Eye Relief (mm): 12.7 Weight: 1.76 lb Warranty: Backed by Barska's Limited Lifetime Warranty Package Contents: Barska Colorado 10x50 Binocular Soft Carrying Case Neckstrap Lens Covers Lens Cloth Barska 72997: Colorado 10-40x50mm Binoculars Black