Learn photography from 0.

Learn the aperture of the three elements of photographic exposure from 0.

About Aperture: Aperture is a hole made up of blades on the lens. Adjusting the aperture size, thereby adjusting the amount of light entering, is a "gate" to block and release light from entering.

The numerical value of the aperture is represented by the letter f plus the number. Common aperture values are: F 1, F 1.4, F2, F2.8, F4. F5.6, etc.

F5.6 is on the left. The larger the values, such as F8 and F8, and F 16, the less light enters the camera and the darker the picture. On the contrary, the smaller the value after f, the more light enters.

The influence of aperture on blur (depth of field) is as follows: the smaller the value behind f, the larger the aperture, and the more blurred the object behind the picture; The larger the value behind f, the smaller the aperture, and the clearer the object behind the picture (it should be noted that the brightness (exposure) of the picture is the same at this time, but the blur is different, so the shutter needs to be adjusted to obtain normal exposure.

Influence of aperture on exposure: Under the condition of constant shutter and iso, the smaller the value behind f, the larger the aperture, the more light passing through and the brighter the picture. The larger the value after f, the smaller the aperture, the less light passing through and the darker the picture.

Application of aperture: blur the messy background when shooting portraits with large aperture, and narrow the distance between the lens and the subject when shooting still life and flowers, so as to keep the subject away from the background and achieve a dreamy and clean picture effect. When shooting people with small aperture and wide scenery, you can also shoot the flow track of light in low light or dark environment, and pay attention to using a tripod with a small light roll.

Application of aperture

Close-up of flowers F 1.2-4.

Static character F 1.2-4.

Human capture F2.8-5.6.

Landscape photo F8- 16.

Auto snapshot F2.8- 1 1.

Group photo F4- 16.

Fireworks F2- 16.