N75C6 7x50 Bak 4 Waterproof Boating Binoculars 1. Moderate size, easy to carry. 2. Prisms: Bak4 glass, clear image. N75C6 7x50 Bak 4 Waterproof Boating Binoculars1 ... . Moderate size, easy to carry.2. Prisms: Bak4 glass, clear image.3. The waterproof binoculars is equiped ...