Ask domestic photographers to talk about the skills of taking pictures.

There are three basic knowledge points in photography: ISO, aperture and shutter speed.

What is the relationship among ISO, aperture and shutter speed?

The same point is that all three can adjust the exposure brightness. There are many differences. ISO is the nominal unit of photosensitive sensitivity of photosensitive devices. The higher the ISO, the less exposure the photo needs. Low sensitivity (such as ISO 100) has fine picture quality and less noise; High sensitivity (such as ISO6400, ISO 12800), poor image quality and much noise. Under normal light, it is suggested that the ISO of the entry machine should be set to 800 or below as far as possible; If the light is sufficient, use ISO 100 or 200, and the imaging at night must be increased.

Aperture controls depth of field. The larger the aperture, the shallower the depth of field and the greater the luminous flux. In other words, a small "aperture value" represents a large aperture and a large "aperture value" represents a small aperture. For example, f/ 1.2, f/ 1.8, and f/2.8 all represent large aperture (note that general f/+ refers to aperture value), in which f/ 1.2 has the largest aperture.

The faster the shutter, the clearer the image, and the faster the shutter can get the instant target of solidification. The following is a comparison of the three, which is convenient for memory. When the ISO value is x2 (doubled), the sensitivity of the photosensitive device is doubled, and the required exposure is reduced to the original aperture value x2 1/2, and the exposure is reduced to the original 1/4 (reciprocal relationship of squares). So the difference between the two apertures is 1.4 14 (root number 2) times. Shutter speed x2, exposure reduced to the original 1/2, this is just a small opinion, after all, everyone's understanding is different.