3x28 Polarized Binoculars for Fishing, Army Fans Outdoor Glasses Telescope with Box -Black ADJUSTABLE FOCUS & VIEW: The focus can be adjusted from 1 to 3 ratio.Field of view around 13 degrees. Diameter of objective lens around 28 mm. SPECIFICATION: Exit pupil around 2.3"-2.9"(58-74mm) with adjustable diopter, eyes pitch around -12-5D with optical lens made of plastic. HANDS FREE: This glasses style Fishing Binoculars is easy to wear and take off, with a rope for you to hang in the chest. BEAUTIFUL MADE & SIZE: With high-strength engineering plastics, very durable and practical.Standard Size: 6"* 5.8"* 1.2" Weight: 3oz (60g) WIDE APPLICATIONS: Large field of vision & high-definition, widely used in opera, sports, fishing, tourism and other indoor and outdoor recreational activities.