Introduction of motorized zoom lens

Electric zoom lens refers to a new type of lens that uses an electric motor, integrated control card, and control software to adjust the magnification of the lens, and can achieve the clearest image by observing the real-time image of the computer. The lens has an automatic alarm Protection function to effectively protect the lens from mechanical failure.

        There are two types of motorized zoom lenses, one is a two-variable lens; the other is a three-variable lens. A two-variable lens means that the focal length (f) and focus (Fcous) are changed by a motor drive, and the iris (IRIS) is automatically controlled by a camera driving signal, that is, an automatic iris. Three-variable means that the three parameters of focus, focus, and aperture are all driven by an electric motor. Therefore, generally speaking, the performance of the two-variable lens is slightly better than that of the three-variable lens, and the price is slightly higher.

Common lens types are manual / automatic aperture fixed focus lenses and automatic aperture zoom lenses.

1. Manual / automatic aperture fixed focus lens;

Manual iris lens: The ambient illuminance to be monitored does not change much, such as indoors.

Auto iris lens: The ambient illuminance to be monitored changes greatly, such as outdoors.

There are two types of fixed-focus lenses: standard lenses and wide-angle lenses. The scope of application is as follows: Wide-angle lenses: Wide monitoring angles and short distances.

Standard lens: Moderate angle and distance for surveillance.

2.Auto-iris zoom lens

(1) The zoom lens is divided into 10x, 6x, and 2x zoom lenses. The other method is: manual zoom and power zoom (motorized aperture and automatic aperture).

(2) The zoom lens can be divided into: 1 / 3〃, 1 / 2〃 and 1〃.

(3) The principle of selecting a zoom lens is: the specifications of the lens should not be smaller than the specifications of the camera, that is to say, a 1 / 2〃 lens can be used with a 1 / 3〃 camera, but a 1 / 3〃 lens cannot Use on 1 / 2〃 cameras.

       The power zoom lens refers to a CCTV lens that uses the C / CS interface and is used in conjunction with an ordinary gun camera. The zoom, focus, and aperture functions can be manually controlled by the back-end controller. Generally speaking, the power of the power zoom lens is relatively large. Commonly used are 6x, 7x, and 10x lenses. Most of the focal lengths are below 100mm, and there are 15x, 16x, 20x, and 22x. Most of the focal lengths are between 100mm-300mm, and there are more, 30 times, 33 times, 50 times, 100 times. Generally, the focal length is more than 300mm, and some can reach or exceed 1000mm, which is especially suitable for ultra-long distances. monitor.