What exposure modes are there?

1, aperture priority (AV). Outdoor priority can use aperture priority mode, which is suitable for snapshot. Set the aperture and the camera will automatically give a shutter value.

2. Shutter priority (TV). Shooting fast-moving objects can use shutter priority.

3. Automatic exposure mode (P). Only the aperture and shutter values are set automatically by the camera to ensure sufficient exposure, and the focus and flash are set manually.

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 equipment and astronomical observation equipment.

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.

2065438+In September 2008, the Harmonized System Committee of the World Customs Organization classified UAVs as "flying cameras".