1852 binoculars model outdoor 8x42 bak-4 prism, waterproof

1852 binoculars Outdoor 8x42, waterproof

The binoculars are designed for use on the water and have the following features:
· Center focus
· Magnification/lens 8x42
· BaK-4 Prism
· Angle of view: 6.6 (116m at 1000m)
· Black rubber reinforcement
· Pop-up eye cups
Nitrogen gas filled
· Multi-Coated
· Waterproof 1.5M/30min
· Comes with bag and strap

Center focus
Manual focus with central adjustment.

Magnification/lens 8x42
The image is 8 times larger than what the naked eye sees. 7x is the recommended magnification in marine binoculars. The second number 42 indicates the diameter of the lens. The higher the number, the better the light penetration. This is an advantage in poor 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 lens, through the prisms to the eyepiece and out to the eye. BK-4 is an excellent quality optic.

Viewing angle: 6.6
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 6.6º gives a width of 115.3 m at a distance of 1000 meters.

Multi-Coated
Allows 90% light transmission.

Waterproof binoculars with excellent quality optics.

Specifications

Focus system: Center focus
Size: 14 x 5 x 12 cm
Viewing angle: 6.6°
Prism: BK-4