Monocular is a compact optical device for observing the area. They are compact and lightweight, which allows you to always take the device with you.
When choosing a monocular, you should pay attention to such parameters as lens diameter, field of view, lens coating, tightness and dimensions. The design uses the same optical design as in binoculars, the characteristics of which depend on the quality and price of the product. Monoculars are often used as night vision devices allowing observation even in complete darkness.