It's important to understand your scope. Unlike traditional scopes (typically with windage and elevation turrets), thermal scopes don't normally have those, so you'll need to learn how to make digital adjustments. It might be worth checking out the owners manual before you step out on the range to sight your scope. When sighting in, you need to use the exact calibre rounds you plan to use for real as bullet drop affects different calibre rounds in different ways. Normal paper targets won't do the job for sighting in your thermal scope, so you should invest in a thermal target (they glow under thermal lighting and are easy to see with a thermal scope).

Or if you're on a budget, you just need to make sure you generate heat around your target. Hand warmers are often suggested as a cheap and easy way to generate the heat you need in order to be able to see your target easily and clearly. Once you're ready to step out onto the range you'll need to set your target up. Since thermal scopes are most often on rifles you would normally set the distance at 100 metres. Now it's time to take your shots. Unless you are a very experienced shooter a minimum of five shots is advised. Once you've taken your shots head out to your target and make sure your shots are clustered together. Then it's time to adjust your scope vertically and horizontally to get close to the bullseye. Once you've made your adjustments head back to the starting block and take further shots. If all the shots are clustered close to the bullseye, you've successfully sighted your scope in. If not, repeat the process until you are able to do so.

Various military operations, night hunting, and dozens of other events held at night would be inaccessible without modern thermal sights. These devices can uniquely form a thermal image of the examined area, which people use to detect and identify animals, people, various equipment, and surrounding objects. Thanks to this, the user receives valuable information, which he uses to achieve his goals. Despite their popularity, thermal scopes are relatively simple devices. At the same time, simplicity can be traced in everything, including the principle of action.

The work of thermal sights begins with collecting infrared radiation from all the objects surrounding the user. This work is done by the lens of optics, which is one of the critical elements of the design. Based on the received information, a thermal image is created. To do this, infrared rays are focused and fall on particular detectors. The latter always has a high sensitivity, so they do not let through even the most subtle radiation. These design details help the sight form the so-called thermogram. After that, it is transformed into electrical impulses sent to the electronic system of optics. There they are subjected to various influences, which makes it possible to obtain a thermal image visible to a person at the output. It is sent to the sight display, often built into the eyepiece. The final shot makes it possible to see the boundaries of various objects and the degree of heating of their areas. The higher the temperature, the brighter the color will be. Strongly heated regions are distinguished by warm shades (for example, red, orange, and various variations of yellow), and less hot areas are characterized by cold ones (green, blue, and others).