What do AM and FM on the camera mean respectively?

Here AM refers to camera autofocus. In other words, if the dial key selects AM and the shutter is pressed half-way, the camera will automatically focus and display the focus. FM stands for manual focusing. If you choose FM, you must turn the focus ring yourself to focus.

1, focusing skills of FM camera

Focusing is very important in photography. The basic requirement of a good photo is to focus correctly and ensure the focus is clear. Portrait shooting: Be sure to focus on the human eye as much as possible. Shooting the scene of a large scene: aim at infinity and focus, or aim the camera at the position of 1/3 in front of the picture to get the clearest picture with the maximum depth of field. ? Take close-ups (such as macro photography): Focusing is more important, because usually when shooting this subject, the lens is very close and the aperture is large. If you are out of focus, the picture will be blurred. So in this case, focus carefully, or choose manual focus to ensure clear low light environment:

1, AM photography focusing skills

Auto-focus is achieved by contrast. In the case of insufficient light, the contrast is small, and sometimes autofocus will "fail". You can focus on linear objects near the subject or positions with obvious boundaries. If you take a portrait, you can ask the subject to put a finger up and put it next to your eyes to let you focus.