Canon SLR, how to adjust the focal length and focusing mode?

1, focus selection, that is, there is a key marked with a four-point cross on the upper right edge of the back of the fuselage. After pressing, turn the wheel behind the camera shutter to change and select the focus.

2. As long as you hold down this key with your right thumb and keep your eyes on the viewfinder, you can quickly turn the thumbwheel according to the red luminous point in the viewfinder to change the focus selection.

3. Press the autofocus mode selection/driving mode selection button.

In the real-time display shooting screen, press the auto-focus mode selection/driving mode selection button, and the icon of auto-focus mode will be displayed on the LCD monitor.

Extended data:

Manual focus

Manual focusing, that is, manually turning the focusing ring to adjust the camera lens, so as to make the captured photos clear, largely depends on the judgment of the human eye on the image on the focusing screen, the photographer's proficiency and even the photographer's vision.

Multiple focusing

Many digital cameras have multi-focus function or area focus function. When the focus center is not set in the center of the picture, multi-point focus or multiple focus can be used. Common multi-point focusing includes 5: 00, 7: 00 and 9: 00.

Holographic autofocus

Holographic AF is a unique function of Sony digital camera and a brand-new autofocus optical system. It uses advanced laser holography technology to detect the edge of the object by laser spot. Even in the dark environment, it can take photos with precise focus, and the effective shooting distance is 4.5 meters.

References:

Focus-Baidu Encyclopedia