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Welcome to my store, we have many kinds of price products, we launch new products every day, please follow my store and pay more attention, for more products, Please click on the seller information to enter our store to buy, we hope give you a pleasant shopping experience. Thank you and have a nice day. Video cameras, waterproof digital video cameras, there are many kinds of video cameras, and the basic principle of their work is the same: convert optical image signals into electrical signals for easy storage or transmission. When we shoot an object, the light reflected on the object is collected by the camera lens, focused on the light-receiving surface of the camera device (such as the target surface of the camera tube), and then the light is converted into electrical energy through the camera device, that is, we get "video signal". The photoelectric signal is very weak and needs to be amplified by the pre-play circuit, and then processed and adjusted by various circuits. The final standard signal can be sent to a recording medium such as a video recorder for recording, or transmitted through a transmission system or sent to a monitor. show.