Overview of the use of zoom infrared lens

The zoom infrared lens is a camera lens that can change the focal length within a certain range, so as to obtain different wide and narrow angles of view, different sizes of images and different scene ranges. The zoom lens can change the shooting range by changing the focal length without changing the shooting distance, so it is very conducive to picture composition. Since one zoom lens can also serve as several fixed-focus lenses, it not only reduces the number of photographic equipment carried when traveling, but also saves the time for lens replacement. The disadvantages of the zoom infrared lens compared with the fixed focus lens: 1. The price is expensive; 2. Large size; 3. Under any certain focal length, its imaging is often not as clear as the best fixed focus lens. Leaving aside these inherent defects, the optical industry uses computers for lens design and has produced many very good zoom lenses. Many zoom lenses have very clear imaging, and the size is quite small, but the price is still very expensive.