How to adjust the aperture of 5D3?

Turn the mode dial to Av, set the required aperture value, turn the mode dial to M, set the shutter speed and set the aperture. For a more detailed explanation, please refer to page 164- 166 of the electronic manual. In the P position, if you want to change the exposure combination of the program, you can change the combination of shutter speed and aperture by half pressing the shutter button and then turning the dial.

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

For the manufactured lens, we can't change the diameter of the lens at will, but we can control the luminous flux of the lens by adding a polygon or circular aperture grating with variable area inside the lens. This device is called an aperture.

We already know that the speed of a lens refers to its ability to transmit light. If we don't want the lens to receive the maximum amount of light, we need a way to reduce the amount of light in the lens. We achieve this goal by changing the aperture size of the lens. Aperture is a circular hole produced by the variable aperture (blade group) in the center of the lens.

References:

Aperture _ Baidu Encyclopedia