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A digital camera is a product that integrates optics, mechanics and electronics. It integrates the conversion, storage and transmission of image information, and has the characteristics of digital access mode, interactive processing with computer and real-time shooting. The light enters the camera through the lens or lens group, and is converted into a digital signal through the imaging element of the digital camera, and the digital signal is stored in the storage device through the image computing chip. The imaging element of the digital camera is CCD or CMOS, and the imaging element is characterized in that when the light passes through, it can be converted into electronic signals according to the difference of the light. The digital camera first appeared in the United States. More than 230 years ago, the United States used it to transmit photos to the ground through satellites. Later, digital photography was turned to civilian use and its application range was continuously expanded. First of all, the choice of camera bag should choose performance such as: rainproof, shockproof, dustproof, fireproof and so on. There are many types of camera bags on the market: JEEP, Lowepro, Weifeng, Buckingham, Rihua, Buster, Guidoxi and so on.