binoculars are similar to couple of telescopes put together and pointed at a similar area. Unlike a monocular, it is easier to perceived and look at long distance objects.
Binoculars are not new invention .We were using it for the past couple of centuries. With the invention of telescope, people began to look through telescopes as they were mounted side by side.
In the 18th century a prism kind of binoculars came out, enabling greater perception as the eyepieces were spaced wider to look at long distance object.
Porro prisms were and are the most inexpensive types of prism, allowing bright images. These are also precise instruments, since the binoculars are wider.
The roof prism binocular is an expensive type. It is smaller and narrower, but it losses some of the brightness. However it eliminates the need of realign the binoculars. Optical coating is used for this type of binoculars.
Optical coating is a great feature that helps in creating a brighter image through the reduction in the amount of light reflected. Images are often seen hazy when there is reflected light inside binoculars.
There are type of binoculars like general binoculars, which are focused through movement of a round wheel, which in turn focuses both telescopes. More advanced or costly types of binoculars make use of independent focus; one have to adjust both side of binoculars
There are also binoculars in the market , which make use of image stabilization technology preventing sudden movement. This type of feature of binoculars can be turned off or on by the user. High-powered binoculars are also handheld, although the image quality leaves a lot to be desired. The prices are also steep.
At many tourist destinations, binoculars appear in coin-operated machines allowing tourists a more detailed sight of the place they are looking at. Most of these coin-operated binoculars are placed on a pedestal, and they are normally high powered.
Binoculars used by military personnel are far more different. Military binoculars are hand held, with a magnification of at least 5 to 7 times of the image. The typical military binocular is far tougher compared to other binoculars. They also boast of other features like the capability to work even when wet and capability of blocking out laser beams
Those who are interested in viewing stars and planets would need an astronomical binocular. Pluto, Uranus, and Eris can also be viewed using astronomical binoculars.