Nikon Action Extreme 7x50 ATB Focus Knob Rubber Armored Coating Binoculars with Harness BundleNikon Action Extreme 7x50 ATB Central Focus Knob Rubber Armored Coating Customizable Binoculars The Nikon Action Extreme 7x50 ATB Binoculars feature bright, multicoated lenses and BaK4 high index prisms that deliver bright, high resolution images. It offers a clear and comfortable view, especially for people who wear eyeglasses. It has a smooth central focus knob that enables a fast range of focus for quick viewing. The unique click stop, twist out