1852 Binoculars Model Crew 7x50 Autofocus BaK-7 Prism (without batteries)

The binoculars are designed for use on water and have the following features:
Autofocus
• Magnification/Lens 7x50
• BK-7 prism
· Image angle: 6.6 (115m/1000m)
• Black/blue rubber reinforcement
• Foldable eyepieces, a great advantage for eyeglass wearers
• Fully coated lenses
Comes with bag and strap.
<B>Autofocus</B> Maintains automatic focus.
<B>Magnification/Lens 7x50</B> The image is seven times larger than what the naked eye sees. 7x is the recommended magnification for marine binoculars. The second number, 50, indicates the diameter of the lens. The higher the number, the better the light gathering. This is advantageous in low-light conditions. A 50mm lens is recommended for use at sea.
<B>BK-7 prism</B> Borosilicate prism material of class B. Has a good ability to transport light and image from the objective lens through the prisms to the eyepiece and out to the eye.
<B>Viewing angle: 6.6</B> The viewing angle in degrees indicates the width of the image visible at a distance of 1000 meters. A viewing angle of 6.6° results in a width of 115 m at a distance of 1000 meters.
<B>Fully coated</B> Allows 84% ​​light transmission.

Focus system: Autofocus.
Viewing angle: 6.6°