Marathon 7x50mm BAK-4 Prism Binocular Black

Marathon 7x50mm BAK-4 Prism Binocular Black. Engineered with a premium BAK-4 prism it offers an excellent viewing experience with superior light transmission and less peripheral light being lost due to internal reflection. This binocular is built to thrive in any environment; waterproof and submersible to a depth of 0.5m for up to 20 minutes and featuring a nitrogen-filled case to prevent fogging of the lenses during changes in heat or humidity. Specifications for Marathon 7x50mm BAK-4 Prism Bin