Bushnell 7x50 Marine Binocular with Illuminated Compass & Accessory Bundle Marine binocular with 7x magnification and 50mm objective lens Illuminated, analog compass and ranging reticle BaK-4 porro prisms for bright, clear, crisp viewing Fully multi-coated optics for light transmission and brightness 100% waterproof / fogproof&nbsp;and resists saltwater corrosion