The Barska 10-30x60 Escape Zoom Binocular has multicoated BK-7 optics in a traditional porro prism design. The moderate objective size improves the ability to steadily hand-hold the binocular without a distracting amount of movement or the need for a tripod. This allows the Escape Binocular to be available for immediate use whenever those unexpected must-see situations present themselves. A large tactile center focus knob makes for fast and precise focusing, while the zoom lever allows the user to easily zoom in without taking their eyes off the subject. An eyepiece diopter adjustment allows customization for each individual eye affording less eyestrain over long-term viewing. This binocular has shock-absorbing rubber armoring for a comfortable, secure, slip-free grip.• Multi-Coated Optics• BK-7 Porro Prisms• Center Focus Knob• Zoom Lever• Wide-Angle Field-of-View• Rubber ArmoringSpecificationsModel Number: AB11050Focus System: CenterPrism Type: PorroPrism Glass: BK-7Magnification: 10x - 30xClose Focus: 42'Eye Relief: 14 mm @ 10xObjective Lens: 60 mmExit Pupil: 6 - 2 mmField of View @ 1000 yds.: 186' @ 10x / 102' @ 30xDiopter: Right EyeOptical Coating: Multi-CoatedWaterproof: NoFogproof: NoWeight: 40.8 oz. Finish: Matte BlackIncluded Accessories: Carrying Case, Lens Covers, Neck Strap, and Lens ClothMfr. Warranty: Limited Lifetime Warranty Large tactile center focus knob for fast, precise focusing Zoom lever lets you zoom in without taking your eyes off the subject Shock-absorbing rubber armoring for a comfortable, slip-free grip | Barska 10-30x60mm Escape Zoom Binocular