The Coleman 7x50 Waterproof Binocular features 7x magnification power and BAK4 porro prisms. It is suitable for camping hunting sports events and bird watching. The binocular is waterproof fog-proof and dustproof ensuring smooth and tension-free operation even in harsh environments. The porro prism inner focus design helps deliver bright and vivid images with improved light transmission efficiency and comes enclosed in a rubber-armored housing that provides extra protection in addition to offering a non-slip grip. Nitrogen gas inside the binoculars prevents fogging and the accumulation of mold on internal lens surfaces even under severe and extreme conditions Fully Multi-coated Optics Waterproof Twist-up Rubber Eye Cups Nitrogen Purged Dustrpoof Magnification: 7x Objective Lens Dia: 50mm Field Of View: 5.7 Exit Pupil: 7.1mm Relative Brightness: 51 Eye Relief: 18mm
High-index Bak4 Porro Prism