How to choose the best city walkie-talkies

Today, many people want to buy city radios for different goals. For example, walkie-talkies are very popular with airsoft players – they are a great opportunity to coordinate actions to demonstrate maximum efficiency in battle. They can also be a good choice for builders, security guards, drivers, and many other people. But you have to be careful about choosing a suitable walkie-talkie.

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Baigish-6U Night vision device

The principle of operation of the device is based on the amplification of weak natural night light (moon, starry sky) by an electron-optical converter. Baigish-6U is a II generation night-vision device and is equipped with two eyepieces that converge into one optical axis. The device has one lens and one electron-optical converter. Passing through them, the beam of light bifurcates and enters both monoculars. So we get a stereoscopic image as if we were looking at binoculars. The image is more realistic, and the eyes are less tired.

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Telescope aperture comparison & Focal length

Every telescope can be chosen on the basis of two criteria because one of the main characters that will be taken into account is either aperture or focal length. Aperture in a telescope is the objective length diameter when it is referred to a refracting telescope or the primary mirror when it is referred to reflecting telescope. So, if you switch to greater focal length, it is clearly better to observe remote objects in space such as the Moon, planets, etc. or if you require better observation of DSO (deep space objects) such as galaxies getting a device with greater aperture figures is better.

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