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AF Area Register On, Off || Sony a7R III, a7 III Option Complete Menu Settings Guide (a7RIII a7III)

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MENU → (Focus) → [Focus Area] → [AF Area Registration] → [On]. Set [ Focus Area] to the desired position, and then hold down the Fn button. MENU → (Setup) → [Operation Customize] → [ Custom Key Setting] → Select the desired key → [Regist. AF Area hold], [Regist AF Area tggle], or [Reg.


1. How to separate autofocusing from the shutter release (AF On)
You can control autofocusing and the shutter release independently, instead of activating the autofocus function by pressing the shutter button halfway down. Operate the shutter button with your index finger, and the AF-ON button with your thumb.Generally, this method is called "back-button AF," since the autofocus function is activated using a button on the back side of the camera. This method is helpful in the following situations.

When you want to focus at a specific shooting distance predicting the position of the subject
When you don’t want to hold the shutter button halfway down for a long period of time
When you want to prioritize the shutter release timing, such as when shooting a bird taking off
When you want to control the AF function and the AE function separately


2. Instantly switching tracking on or off while using [Spot] ([Reg. Custom Shoot Set])
When you want to switch between different subjects during autofocus, it is recommended that you set the focus area to [Spot]. However, combining it with tracking is useful if you want to shoot freely composed shots of scenes with rapid movement. Assigning the tracking function to an easily accessible button such as the AF-ON button allows for smoother switching between functions.
Pressing the shutter button halfway down enables you to focus with [Spot]. Pressing the AF-ON button starts tracking of the subject.


3. Instantly switching between multiple focus-area settings ([Reg. Custom Shoot Set])
The [Reg Cust Shoot Set] (Register Custom Shooting Setting) function is recommended for switching instantly between focus-area settings according to the state of the subject. It is useful under continuously changing shooting conditions, such as sports photography. There are three buttons — the AF-ON button, the AEL button, and the focus hold button on the lens — that can be operated without changing your holding position. You can improve the overall operability of the camera by assigning functions appropriately to these buttons according to the shooting situation.


4. Frequently focusing on the same specific position ([AF Area Registration])
In sports photography or portrait photography, when you shoot images with the same composition frequently, you can move the focusing frame to a specified position instantly by pressing a single button ([AF Area Registration]). If you often focus on the center of the image, [Focus Standard] is recommended.


5. Moving the focus area more quickly by using a dial ([My Dial Settings])
Front dial, Rear dial, Control Wheel
Generally, the multi-selector is used when focusing by moving [Spot]. However, using the multi-selector may sometimes cause vertical movement when only lateral movement was intended. In cases like these, you can move [Spot] precisely in only the intended direction by assigning it to a dial. If you frequently adjust the exposure settings and move the focus area using the dials, it is convenient to assign this function to an easily accessible button such as the AEL button.


6. Frequently switching the orientation of the camera between vertical and horizontal ([Switch V/H AF Area])
You can choose whether to switch the position of the focusing frame (focus position) and the focus area settings according to the orientation of the camera (vertical/horizontal). If you frequently switch the camera's orientation, [AF Point Only] is recommended. It allows you to quickly switch the settings according to the situation, such as when you switch the camera to the vertical orientation due to the subject approaching.


7. Pausing the tracking and face/eye detection functions ([Tracking/Face-Off Hold])
Even if you usually shoot images using the tracking or Face/Eye AF function, you can pause the tracking and face/eye detection functions in the following cases, where you want to switch a subject to another one during shooting or the camera cannot recognize a face because the subject is wearing a helmet.
When the tracking function is paused, the focusing area will be switched to the focusing area where tracking was started. When tracking was started by selecting [Spot], you can specify a subject you want to shoot at the spot you set in the frame indicating the focusing area.
After an intended subject is in focus, you can restart tracking by canceling [Tracking-Off Hold].