What is the difference between manual focusing and automatic focusing of SLR cameras? Why do you say manual focusing is good? It is best to illustrate the answer with examples.

The autofocus of SLR means that the machine focuses itself according to the set focus or the machine selects the focus, which is automatically completed by the camera.

Manual focusing is accomplished by turning the lens focusing ring by the photographer's hand. There are certain requirements for photographers' vision and hands-on ability.

Now SLR focusing is faster and more accurate, so many people prefer to use autofocus. In general, autofocus can also meet the needs of daily use. I don't know if you say manual or automatic. I wonder who said that.

But in two cases, manual focusing is really better than automatic focusing.

First, the old lens can't focus manually, or I am used to the old machine and like the feeling of manual focusing.

Second, macro, rigorous macro shooting must use manual focus, because a little out of focus will affect the quality of the out-of-focus photo.

To sum up, in daily use, automatic focusing is enough, but when the camera can't identify or find a good focus, manual focusing is more reliable. In addition, it is best to use manual focusing for macro.

Focusing is not the reason to choose a SLR. The card machine adopts phase focusing, which is also autofocus. Although slower than SLR, it has high accuracy and can focus at any position. The advantage of SLR is that the focus is fast, and the shutter does not feel the delay, that is, it can basically be photographed when it is seen, and the lens can be changed. The photosensitive element (CMOS) is large, so the sensitivity is high and the background blur effect is good. Manual focusing can only be said to be an extra function of SLR than card machine, because general card machine can only focus automatically. In fact, autofocus is the result of the development of technology, and earlier machines can only focus manually. But the machine is a machine after all, and it can't be as smart as people, and people can't focus on what they want, so when the focus of the machine doesn't meet our wishes, the advantage of manual focusing comes out.