Adjustable beam has the advantage of zooming in on far-reaching objects when shooting in the telephoto, but only the optical zoom can support the image subject to be imaged, adding more pixels, making the subject not only larger but also relatively clearer. The adjustable beam flashlight is actually very simple, that is, there is a beam device similar to the camera’s push-pull or rotation in front of the LED. When using the telephoto end, the light will be concentrated, and the light source can be concentrated in a far distance to clearly illuminate. The flashlight clearly shows the shape of a chevron tube on a building 300 meters away. When short-focus is used, the light source is diffused to provide large-scale illumination. This is generally used for close-up lighting when riding. At this time, the light is scattered, the range is wide and the brightness is small.
Adjustable beam flashlight focus mode:
Common focusing methods include light cup focusing and lens focusing. Generally, the requirements for reliability and illumination are relatively high. They are all used in the light cup because of the reflection effect of the light cup, the enhanced beam in the middle, and the surrounding beam. A wide range of floodlights, such a wide field of vision, in line with human vision habits, that is, there are scope and focus. Most of the market’s glare flashlights use reflectors, and customers are using lenses instead of reflectors.
Lenses and reflectors each have their own characteristics. The lens is focused on the flashlight. In the focus mode, there is only the central beam. There is no flooding around. Although the focus is good, the field of view is narrow. In the flood mode, there is no focus. There is only a large amount of floodlight, so you cannot take care of multiple distances at the same time. The visual needs are not ideal. Lens flashlights are often used on adjustable beam flashlights. Focusing is the most common method of stretching. However, this structure is unreliable and not tight, so this method is generally not required for flashlights with high-reliability requirements. The plane glare flashlight (Tactical flashlight) is relatively concentrated, concentrated to a point, strong white light, the concentrated light is displayed, and the illumination distance is farther. The lens flashlight is divided by the principle of focusing. As long as the brightness is high, there is an essential difference in illumination between the lens flashlight and the flat flashlight. The lens flashlight is relatively scattered, and the range is large. Generally, the lens can be adjusted. The way is what we call the telescopic light flashlight.