How to use AF and mf in the camera in actual situations

AF and MF cannot replace each other and each has its own uses.

AF focuses quickly and has a tracking focus function, making it possible to achieve greater focus when shooting moving objects. However, AF has errors, and the results of focusing on the same subject may be slightly different each time. It may not be fully qualified for shooting that requires precise focus. For example, the focus of photos of people with a short depth of field is often the eyes and eyelashes in the front.< /p>

AF may not be able to do what it wants. AF has limitations. The subject cannot be focused if it is not in the focus point. The accuracy of the focus will be reduced if the subject is not in the center. Focus locking and recomposing the image at a close distance will cause out-of-focus. The subject has low contrast and cannot be focused. The subject is too dark and cannot be focused.

MF focusing is absolutely accurate as long as your eyes are good. However, most of the current 35mm SLR focusing screens are designed for AF and are mainly bright, which is not conducive to distinguishing the actual focus area. Non-fully digital SLRs have smaller focusing screens. A full focusing screen suitable for manual focus will be very helpful for MF.

For daily use, you should first be familiar with the AF capabilities and limitations of your own camera. You can use AF as much as possible within the AF capability range. Once you have difficulty with AF, switch to MF.

If the camera has a separate focus button, it is recommended to use the focus button instead of the shutter button to start focusing. A large number of professional sports photographers use this method. They can release the button at any time to cancel focus during dynamic focus, but it does not affect the shutter release. Because dynamic focus is sometimes affected by other factors (such as a focus point being temporarily blocked by another object or rapid changes in light, etc.), the focus may be out of focus.

Another suggestion is that if your funds allow, try to buy an autofocus lens that can focus manually immediately without having to move the focus mode lever. In this case, once you notice that there is a problem with the AF, you can immediately adjust it manually so as not to miss a good shooting opportunity.