How many pixels does a camera need to take good photos?

There is no standard for the number of pixels, and how many pixels are enough depends on how the photo is used.

If the photos taken are basically used on TV screens, computer screens or tablets, then the current full HD standard is 1920*1080, which is 2.07 million pixels; and currently the largest computer The screen resolution is approximately 2560*1600, which is 4.09 million pixels.

The best graphics card can support up to 4096*4096, which is 16.77 million pixels, so if the computer resolution is only Full HD, 2 million pixels is enough. To achieve the effect of traditional film, more than 300 pixels per inch are needed.

Extended information:

A camera is a device that uses optical imaging principles to form images and uses film to record the images. It is an optical instrument used for photography. In modern social life, there are many devices that can record images, and they all have the characteristics of cameras, such as medical imaging equipment, astronomical observation equipment, etc.

After the light reflected from the scene being photographed is focused through the photographic lens (objective lens) and the shutter that controls the exposure, the scene being photographed forms a latent image on the photosensitive material in the camera obscura, which is processed after processing (i.e. Developing, fixing) to form a permanent image. This technology is called photography, which is divided into general photography and professional photography.

The earliest camera structure was very simple, including only a camera obscura, a lens and photosensitive materials. Modern cameras are relatively complex, with systems such as lens, aperture, shutter, ranging, framing, metering, film transport, counting, self-timer, focus, zoom, etc. A modern camera is a technology that combines optics, precision machinery, electronic technology, and chemistry. complex products.