What is zoom in the surveillance camera
This concept of the camera is a principle, the object is small, the scope is relatively large, the distance also follows. The opposite is true. Camera is the most critical equipment, video surveillance systems (indicators) of its quality fit and unfit quality directly affect the camera machine, therefore, whether the camera and the choice of appropriate both to system quality, and is related to the project cost.
Zoom, focus, is the long-term problem! It's going to be the thing that's going to see the camera that's going to be far away. To double that is to magnify the object that you see. Does that make sense to you?
The lens corresponds to the lens of the human eye. Without the lens, the human eye can't see anything. If there is no camera, the image output from the camera is white, and there is no clear image output, which is consistent with the principle of our home camera and camera. When the muscle of the human eye cannot stretch the lens to its normal position, it is the nearsightedness that is often said, and the scene becomes blurred. With the camera and lens has a similar phenomenon, when the images are not clear, can adjust the camera focus after, change the distance between CCD chip and lens datum (equivalent to adjust the position of the eye lens), can be blurred image becomes clear. Thus it can be seen that the camera's role in CCTV is very important. Engineering design and construction personnel are often dealing with lens: design personnel shall be calculated according to the object distance, and the size of the imaging lens focal length, construction personnel on-site commissioning, often is one part of the lens to adjust to the best state.
