The difference between digital cameras and traditional cameras is that all digital cameras have built-in computers and record images electronically, while traditional cameras are completely

A, the traditional camera uses silver salt photosensitive material, namely film, as the carrier. After shooting, the film has to be developed to get the photos. After shooting, you can't know whether the photo shooting effect is good or not, and you can't delete bad photos. A digital camera uses a charge coupled device (CCD) to sense light instead of film, and then converts the light signal into an electrical signal, which is recorded on a memory card after analog-to-digital conversion. The memory card can be reused. Because the photos taken by digital cameras need to be digitized and then stored, the photos taken can be played back and viewed, and the dissatisfied photos can be deleted immediately. So this option is correct, but it doesn't meet the meaning of the question.

B, the lenses of digital cameras and traditional cameras are convex lenses, so this option is correct, but it does not meet the meaning of the question.

C. Compared with traditional cameras, traditional cameras use "film" as the carrier for recording information, and the "film" of digital cameras is its imaging photosensitive device, which is integrated with the camera and is the heart of digital cameras. So, this option is wrong.

D. Both digital cameras and traditional cameras consume electricity, so this option is correct, but it doesn't meet the meaning of the question.

So choose C.