Does the camera need batteries? Do you have a camera that uses only film instead of batteries?

The camera needs batteries, as well as electronic shutter, metering, screen and so on. Both need battery power.

A considerable part of the old film cameras were purely mechanical, with no metering, no mechanical shutter, manual loading and manual rewinding. All operations rely on technology and experience to ensure the imaging quality of photos. Some early 120 cameras, 135 paraxial and SLR cameras and some IOMO cameras are purely mechanical.

The storage medium of digital camera is sensor, while the sensor of ordinary digital SLR is APS-C frame. Even if one end of the left and right ends of the whole frame is removed, the aspect ratio is 3: 2 (23.4 * 15.6), which is the same as the negative ratio of 135. High-end digital SLR can realize Quan Huafu, which is equivalent to 135 film format.

Extended data:

A camera is a kind of equipment that uses the principle of optical imaging to form an image and records the image with a negative. This is an optical instrument used for photography. In modern social life, there are many devices that can record images, all of which have the characteristics of cameras, such as medical imaging devices and astronomical observation devices.

After the light reflected by the shot scene is focused by the camera lens and the shutter that controls the exposure, the shot scene forms a latent image on the photosensitive material in the camera box, and forms a permanent image after being developed and fixed. This technology is called photography, which is divided into general photography and professional photography.