What is the relationship between aperture size and shutter speed when taking pictures manually? How to adjust it?

Aperture and speed are devices used to control the amount of light entering the camera, and they are interrelated and mutually restricted.

In the case of constant light, the speed will increase by one level when the aperture increases, and it will slow down by one level when the aperture decreases.

1, aperture is a device used to control the amount of light entering the photosensitive surface of the fuselage through the lens, usually in the lens. We use the f value to represent the aperture size.

2. Because the focal length of a digital camera is much shorter than that of a traditional camera and the aperture of the lens is small, it is difficult to produce a narrow depth of field. Some digital cameras have a special portrait exposure mode, which uses built-in programs and a large aperture to blur the foreground and background.

3. The function of aperture is to determine the amount of light entering the lens. Under the condition of constant shutter: the smaller the value behind f, the larger the aperture, the more light entering, the brighter the picture, the narrower the focal plane, and the greater the background blur of the subject; The larger the value behind f, the smaller the aperture, the less light entering, the darker the picture, the wider the focal plane, and the clearer the front and back of the subject.

4. When taking pictures, if the light is strong, you should narrow the aperture, and if the light is dark, you should open the aperture. That is to say, the smaller the F value (other parameters remain unchanged), the more favorable it is for shooting at night.