7 x 50 Boat Binoculars BK7 Porro Prism WS Series Marine Navigation Equipment 

Brief Introduction:

Binoculars are described using two numbers, such as 7 x 50 or 8 x 25. The first number identifies the

magnification or power. The second is the diameter of the objective lens (the lens at the front) in

millimeters. Magnification power describes how much closer objects appear when you view them. In a

7 x 50 binocular, the image is magnified seven times. Increased magnification reduces the brightness

of the image, so as magnification increases, binoculars require increasingly larger objective lenses to

maintain brightness. The larger their size, the more light they can gather.

Main Specification:

Specification:7X50
Field of Angle:7.5°                          

Field of View:130m/1000m or 345ft/1000yds                            

Exit Pupil:6.5mm                        

Eye-relief:15mm                        

Minimum Focus Distance:8m    

Size: 19.5 x 6.5 x 19mm
Weight: 870g
Focus System: Center Focus
Prism: BK7 porro prism

1, Appearance and material: concise and easy, ergonomic design, lens barrel internal to the metal structure, external package for high quality non-slip rubber cortex, wear resistance and not easy to dirty,

can be used in a variety of environments. 
2, Eyepiece system: adopting the all-optical glass lenses, high-definition pervious to light blue film plating,

high light transmittance, can be 100% of the reflected light, the image is more clear and bright.In the

evening even in weak light environment, also can see very clear. 
3, Lens system: adopting the all-optical glass lenses, multilayer composite broadband light blue green

film.Good light transmittance, no color difference, imaging and bright, clear and sharp, low refractive

index, which can effectively reduce the eye fatigue. 
4, Central focus fast accurate, watch the scenery, the users only need to turn the telescope in the middle

of the wheel, you can change the focal length, so as to realize precise focus, obtain high-resolution

imaging. 
5, Right eye fine balance parallax: due to the differences between left and right eye eyesight may, when

using, clarity first adjusted the left eye, and then a slight turn right eyepiece, to achieve the best effect,

watch the scenery, the Lord will not appear dizziness, blurred. 
6, Variable times: the telescope with functions of changing times, change times pull rod, multiples of the

size can change a telescope.