Waterproof and fog-free marine binoculars with digital compass, barometer, thermometer & altimeter.
The binoculars are designed for use on the water and have the following functions: · Individual focus · Magnification/lens 7x50 · BaK-4 Prism · Viewing angle: 7 (132m v/1000m) · Shock-absorbing blue rubber reinforcement · Foldable eyepieces - great advantage for spectacle wearers · Eye lenses 23 mm · Nitrogen gas filled · Full multi coated lenses · Waterproof & fog-free · Digital compass, barometer, thermometer & altimeter · Distance meter/calculator · Comes with bag and strap
Individual focus First, each eyepiece is adjusted manually, then the binoculars automatically focus.
Magnification/lens 7x50 The image is 7 times larger than what the naked eye sees. 7x is the recommended magnification in marine binoculars. The second number 50 indicates how large the diameter of the lens is. The higher the number, the better the incidence of light. This is an advantage in low light. For marine use, a 50 mm lens is recommended.
BaK-4 Prism Barium prism material. Has excellent ability to transport light and image from the objective, through the prisms to the eyepiece and out to the eye. The BK-4 is an excellent quality optic.
Viewing angle: 7.0 The viewing angle in degrees indicates the width of the image that can be seen, at a distance of 1000 meters. A viewing angle of 7.0º gives a width of 132 m at a distance of 1000 meters.
