How to set the aperture of photography from scratch at home during the graduation season of college entrance examination?

After studying hard at the cold window 12 years, I finally have to start a good college time. A three-month holiday is really long, so what meaningful things can be done during this period? Candidates who like to take pictures can learn photography, and they can take beautiful scenery when they go to college or travel. Today, I use four pictures to tell you the function and principle of aperture.

The aperture is the transparent part inside the lens. The aperture size can control the amount of light entering.

Aperture function-adjust exposure

When the light is strong, you need to narrow the aperture to avoid overexposure.

When the light is dark, turn on the big aperture to avoid the picture being too dark.

Aperture function-adjust depth of field

(1) The larger the aperture, the smaller the depth of field and the greater the background blur.

(2) The smaller the aperture, the greater the depth of field and the clearer the subject.

Measure aperture size -F aperture number

Aperture f value = lens focal length/lens effective aperture diameter

The f value is inversely proportional to the aperture size.

The smaller the number, the larger the aperture, the greater the amount of light and the depth of the scene.

The larger the number, the smaller the aperture, the smaller the amount of light entering and the deeper the scene.

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