Their Nikon 8X25DCF Sportstar EX Waterproof Binoculars (BAA710AA) large eye relief provides excellent field of vision at all, including people who wear glasses. With O-rings and the process of purging with nitrogen to prevent condensation, the waterproof binoculars are perfect for on the water or in rainy weather.
To reduce glare and light losses. Coating: layer on the outer surface. Complete coating: layer on all surfaces. Multilayer coating: Multiple layers on surfaces. Full multi-layer coating: multiple layers on all surfaces.
The magnification factor is the number of times an object is enlarged with respect to the original when viewed through the binoculars.
The field of view corresponds to the total area that can be seen with binoculars
The focusing distance is the shortest distance at which it is possible to focus
The relative brightness is used to find the optical quality binoculars by poor lighting. So more the relative brightness, the higher the brighter when ambient light is low.
The exit pupil is a small circle of light that you see taking your binoculars at arm's length. Its diameter is obtained by dividing the diameter of the front lens by the magnification
The eye relief is the distance required between the eye and the lens to get the best picture possible. Those who wear glasses need a relatively long eye relief (at least 13 mm)
Diopter correction devices allow you to adjust the image to the view of users whose eyes are not the same force
|Objective lens diameter||25 mm|
|Field of view at 1,000m (m)||143 m|
|Field of view (Apparent / degree)||59.7|
|Field of view (Real / degree)||8.2|
|Exit Pupil||3.1 mm|
|Eye relief||10 mm|
|Closest Focusing Distance||2.5m|