How does Mr. Wang set the after-sales quick lock and focus?

Teacher Wang sets the after-sales quick lock and focus according to the following steps. According to the query related information display,

1, BackButtonFocusing, you have all seen the AF-On key, which is usually set on the back of the machine near the thumb. This is a photographic focusing method called back button focusing. Backbutton focusing is an operation method, not a focusing mode, that is to say, continuous focusing (AF-C) when pressed, and single autofocus (AF-S) when pressed once. Focus and photometry are used separately.

2. Explain the method of turning on the back key to focus (AF-ON). Enter the custom control button, select the shutter button, and select start metering to turn on the default metering and autofocus. After opening the shutter, there is only metering function, but no focusing function. Focusing is controlled by AF-ON.

3. Pressing the AF-ON button once has the same function as single autofocus (AF-S). Focusing once, holding down the AF-ON key has the same function as continuous autofocus (AF-C). Continuous focusing can realize high-speed continuous shooting, save the time of half-pressing the shutter, improve the shooting efficiency and avoid missing the shooting content. Such as news photography, shooting of sports events, etc.