How to set the aperture of SLR camera How to set the aperture of SLR camera

1, how to adjust the aperture of a SLR camera? First, we set the shooting file of the camera to A file.

2. Then have a look. If your camera has a shoulder screen, try dialing the front and rear wheels.

3. If the data of FXX has changed, then the aperture has been adjusted.

4. If the SLR camera has a shoulder screen, turn the dial wheel to adjust the aperture value and display it directly on the shoulder screen.

5. What is the function of aperture? The aperture in a SLR camera is an extremely important physical device. After all, SLR cameras are still cameras. No matter how good the lens is, there will be no ideal effect without a good aperture. This is the same reason that advanced cameras can't take good photos with low-grade film.

6. The aperture is usually located in the center of the lens. It is a circular ring, which can control the opening size of the circular hole and the brightness of light during exposure. When a lot of light exposure is needed, the circular hole of the aperture is enlarged; If only a small amount of light is needed for exposure, the circular hole will be narrowed to allow a small amount of light to enter. The aperture is controlled by a blade installed in the lens, and the blade is movable. The larger the aperture, the larger the opening of the blade in the lens. The so-called "maximum aperture" is a fully open aperture in which the blade does not move and all light sources that can pass through the lens run in. On the contrary, the smaller the aperture, the more the blade shrinks, and finally it can be reduced to only a small point.

7. Aperture acts like a frog in our eyes. Used to control the amount of light per unit time when shooting, generally marked with f/5, F5 or 1: 5. In fact, a smaller f value indicates a larger aperture. The calculation unit of aperture is called aperture value (f number) or series (f aperture). First of all, let's talk about aperture value. The figures of the standard aperture value (f number) are as follows: f/ 1, f/ 1.4, f/2, f/2.8, f/4, f/5.6, f/8, f/ 1 1. The larger the aperture value, the larger the aperture of the lens, which increases its manufacturing cost and difficulty.

8. Series refers to the exposure difference between two adjacent aperture values. For example, f/8 and f/ 1 1 are one step behind, and f/2 and f/2.8 are one step behind. By analogy, the difference between f/8 and f/ 16 is two levels, and that between f/ 1.4 and f/4 is three levels. In professional photography circles, this series is sometimes called "scale" or "scale", for example, there is a scale difference between f/8 and f/ 1 1, or there are two scales difference between f/8 and f/ 16. Between each level (aperture number), the amount of light entering the last number is half that of the previous number. For example, the light input of f/5.6 is only half that of f/4, and that of f/ 16 is only half that of F/1. The later the number is, the smaller the amount of light enters, which decreases in equal proportion.