How do photographers need to focus?

The framing system and focusing system of digital SLR camera are integrated.

In autofocus mode, the photographer can choose the focus point independently, and the focus sensor in the camera will automatically generate the focus area to focus on the subject.

In the manual focus mode, the photographer can still choose the focus independently, but the autofocus system will only play an auxiliary role and will not perform autofocus.

2. Half-press the shutter to focus automatically.

When we use a digital SLR camera, we will find that the camera can focus automatically after half pressing the shutter button, that is, the image can focus from blurred to clear.

Before pressing the shutter button, the picture may be blurred, and the photographer can only see the currently set value in the viewfinder. However, after the photographer presses the shutter button for half a minute, in addition to displaying the numerical value in the viewfinder, the focus will turn red and remain. At this point, the focus indicator lights up and the picture becomes clear, that is, focusing is completed.

3. Flexible change of focus

At present, the autofocus system used in digital SLR cameras often has 9 points, 1 1 point,1point or more. Photographers can take pictures according to different subjects in the picture, and select multiple different autofocus points to focus.

Although there are many focus points in the viewfinder, there will still be a phenomenon that the subject is not covered by the focus points during the viewfinder. At this time, the photographer can select an in-focus point, and then keep the shutter button half pressed after focusing to lock the in-focus point, so as to move the camera to re-compose the picture without changing the distance from the subject.

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