Is the camera concave or convex?

The lens of the camera has convex lens and concave lens, which is a combination of convex lens and concave lens. The effect of overall synthesis is a convex lens. The convex lens can converge the real image to the other side of the lens to form a real image, which exposes the film or electronic photosensitive element, but concave mirror can't.

Camera, full name camera, is a kind of equipment that uses optical imaging principle to form images and record images with negative. A camera is an optical instrument used for photography. After the light reflected by the photographed scene is focused by the photographic lens and the shutter controlling the exposure, the photographed scene forms a latent image on the photosensitive material in the camera box, and the latent image is developed to form a permanent image. This technology is called photography. Digital camera is a kind of camera that uses electronic sensors to convert optical images into electronic data. Different from the principle that ordinary cameras record images on film through the chemical changes of silver bromide, the sensors of digital cameras are light-induced charge-coupled -{zh-cn: devices; Zh-tw: Component }-(CCD) or complementary metal oxide semiconductor (CMOS). Before an image is transmitted to a computer, it is usually stored in a digital storage device (usually using flash memory; Floppy disks and rewritable compact discs (CD-RW) are rarely used in digital camera equipment. Digital camera is a product integrating optics, machinery and electronics. It integrates the conversion, storage and transmission of image information, and has the characteristics of digital access, interactive processing with computer and real-time shooting. Digital cameras first appeared in America. More than 20 years ago, the United States used it to transmit photos to the ground via satellite. Later, digital photography was converted to civilian use, and its application scope continued to expand.