Vivitar CS850 8 x 50 Binocular (Black) 7x Magnification Reliable Center Wheel Focus Design Diopter Adjustment for Precise Focusing Porro Prism binoculars Ideal for all types of use: birdwatching, theatre and sporting events, to name a few Diopter adjustment for precise focusing Multi coated optics for clear, sharp views Reliable center wheel focus design