How to adjust the aperture of Canon SLR?

1. First, prepare the camera to be adjusted, as shown in the figure below.

2. Then turn the mode knob to the aperture priority position, as shown in the figure below.

3. Then you can adjust the special size of the aperture by turning the gear circled in the figure below in the left and right direction, as shown in the figure below.

4. The place circled in the figure below is the numerical size of the aperture. The maximum or minimum value of the aperture varies with different lenses, as shown in the following figure.

5. Next, you can adjust the aperture value to the position of 5, and take a photo with this value first, as shown in the figure below.

6. Then look at the effect of this numerical shooting, and you will find that the background behind is blurred, as shown in the following figure.

7. Then adjust the aperture value to 13 before shooting, as shown below.

8. Finally, take a look at the effect of the adjusted shooting. This time it was very clear, so the aperture was adjusted, as shown below.

Extended data:

First of all, the aperture size

The smaller the values behind 1 and f, the larger the aperture, the more light entering, the brighter the picture, the narrower the focal plane and the more blurred the background of the subject.

2. 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.

Second, the role of the aperture

1, which can adjust the amount of light entering the lens. For example, domestic kittens always shrink their pupils into a line during the day, and automatically Zhang Kaicheng a round hole at night. So in the same way, when taking pictures, the aperture should be narrowed when the light is strong, and the aperture should be opened when the light is dark. That is to say, the smaller the F value (other parameters remain unchanged), the more favorable it is for shooting at night.

2. Aperture is the most important factor to determine the depth of field, including small aperture (large aperture value), depth of field, large aperture (small aperture value) and depth of field. For example, nearsighted friends, if they don't wear glasses, always habitually squint at things, so they can often see things clearly. Applying photographic terminology, this is called: narrowing the aperture (pupil) and increasing the depth of field.