Surveillance is a daily component of the job as a law enforcement officer. A good pair of binoculars and the understanding of how they work are essential to the task. Bushnell’s Marine 7X50 binoculars are outstanding in this arena. Why? That requires a little explanation.
Tech alert: if you don’t want to learn about how binoculars work, too bad.
A binocular optic enhances our vision by magnifying the light that enters our eyes. Binocular vision means having two eyes arranged for stereoscopic viewing, which gives us depth perception.
The magnification power of a binocular is the first number, say, 7 in 7X50. These binoculars have a 7 power (7X) magnification and a 50 mm objective lens in the front. The larger the objective lens, the more light it gathers.
Much of police surveillance occurs in low light or darkness conditions. Traditionally, 7X50mm binoculars are referred to as “night glasses” because of the maximum amount of light they can provide at dawn or dusk. This also works when the sun has gone down.
Simply speaking, the size of the “exit pupil” of a binocular determines how much light Continue reading