The Sony a7III is a versatile and powerful mirrorless camera, with a range of focus area options to suit different shooting scenarios. Here's a breakdown of the focus area options available on the a7III, and when each would be most appropriate to use: 

Wide Focus Area 

The Wide Focus Area option on the Sony a7III is a flexible and versatile option that gives the camera broad coverage of focus points to choose from. This means that the camera can focus on a wide range of subjects within the frame, increasing the chances of getting sharp focus. 

When using the wide focus area, the camera uses a large number of focus points spread across a large portion of the frame. This is ideal for situations where you want to let the camera do the work, such as when shooting landscapes or still life scenes. The wide focus area option also comes in handy when you're shooting a scene with multiple subjects and you want the camera to focus on the most prominent one. 

It's worth noting that when using the wide focus area, the camera may prioritize focusing on the closest subject in the frame. This can be a useful feature when you want to ensure that the closest subject is in focus. However, it can also lead to unwanted focus if you're trying to focus on a subject further away. 

In general, the wide focus area option is a smart choice when you're shooting in a stable environment and have time to adjust your focus. This is also true when you want the camera to do the work for you. Whether you're a seasoned photographer or just starting out, the wide focus area is a versatile and flexible option that can help you get the shot you want. 

Zone Focus Area 

The Zone Focus Area option on the Sony A7III gives you more control over the focus points. This is because it allows you to select a smaller group of focus points within the wider focus area. This option is useful when you want to limit the focus points to a specific area of the frame, giving you more control over where the camera focuses. 

When using the zone focus area, you can select a group of focus points that cover a smaller section of the frame. This could be the centre or a particular part of the scene. This is useful when you need to focus on a specific subject, such as a portrait subject or still life object. You can also limit the focus points to a specific part of the scene. For example, if you're shooting a landscape scene and you want to ensure that the focus is on a specific mountain range, you can use the zone focus area to select a group of focus points in that area. 

The zone focus area option is also useful when you're shooting in a situation where the subject is moving, but you still want to control where the camera focuses. For example, if you're shooting a soccer match and you want to focus on a specific player, you can use the zone focus area to select a group of focus points in that area of the field. 

The zone focus area option on the Sony A7III gives you more control over the focus points and allows you to focus on specific parts of the frame. Whether you're shooting portraits, still life scenes, or action scenes, the zone focus area option can help you get the shot you want with greater precision. 

Center Focus Area 

The Centre Focus Area option on the Sony A7III allows you to focus on a single point in the centre of the frame. This option is ideal when you want to ensure that the focus is on a specific subject in the centre of the frame. In addition, you want to avoid any potential focusing errors that may occur with other focus options. 

When using the centre focus area, the camera will focus on the subject located in the centre of the frame. It will not be able to focus on any other subjects that may be in the scene. This is useful in situations where you want to ensure that the focus is on a specific subject, such as a portrait subject. In addition, you want to avoid any potential focusing errors that may occur with the other focus options. 

Additionally, the centre focus area option is useful when you're using a lens with a shallow depth of field. This is because you want to focus on a specific subject and create a blurred background. By using the centre focus area, you can ensure that the focus is on the subject in the centre of the frame, while the background will be blurred. 

The centre focus area option on the Sony A7III is a simple and straightforward option. This allows you to focus on a specific subject in the centre of the frame. Whether you're shooting portraits, still life scenes, or any other type of subject, the centre focus area option can help you get the shot you want with enhanced precision. 

Flexible Spot Focus Area 

The Flexible Spot Focus Area option on the Sony A7III allows you to focus on a specific point within the frame, giving you increased control over the focus. This option is useful when you want to focus on a small, specific subject. You also want to avoid any potential focusing errors that may occur with other focus options. 

When using the flexible spot focus area, you can select a single focus point within the frame, and the camera will focus on that specific point. This is useful when you want to focus on a specific subject, such as a bird in a tree or a flower in a garden. You want to avoid any potential focusing errors that may occur with other focus options. 

Additionally, the flexible spot focus area option is useful when you're using a lens with a shallow depth of field. This is because you want to focus on a specific subject and create a blurred background. By using the flexible spot focus area, you can select the focus point on the subject, and the background will be blurred. 

The flexible spot focus area option on the Sony A7III gives you full control over the focus, allowing you to focus on a specific point within the frame. Whether you're shooting portraits, still life scenes, or any other type of subject, the flexible spot focus area option can help you get the shot you want with greater precision. 

Expand Flexible Spot Focus Area 

The Expand Flexible Spot Focus Area option on the Sony A7III is similar to the Flexible Spot Focus Area, but with an added level of versatility. It allows you to select a single focus point. However, if the subject moves or the focus point is obstructed, the camera will automatically use surrounding focus points to maintain focus on the subject. 

When using the Expand Flexible Spot Focus Area, you can select a single focus point within the frame, and the camera will focus on that point. If the subject moves or the focus point is obstructed, the camera will automatically switch to surrounding focus points to maintain focus on the subject. This option is useful when you want to focus on a specific subject, such as a moving subject. You want to ensure that the focus remains on the subject, even if it moves or the focus point is obstructed. 

Additionally, the Expand Flexible Spot Focus Area option is useful when you're using a lens with a shallow depth of field. This is because you want to focus on a specific subject and create a blurred background. By using the Expand Flexible Spot Focus Area, you can select the focus point on the subject. The camera will automatically switch to surrounding focus points to maintain focus on the subject, even if it moves. 

The Expand Flexible Spot Focus Area option on the Sony a7III provides a high level of control over the focus, allowing you to focus on a specific point within the frame, while also providing the flexibility to maintain focus on a moving subject. Whether you're shooting portraits, still life scenes, or any other type of subject, the Expand Flexible Spot Focus Area option can help you get the shot you want with greater precision. 

In conclusion, the Sony a7III offers a range of focus area options to suit different photography scenarios. Whether you're looking for a simple and straightforward option for portraits, or you're looking for a more flexible option for capturing moving subjects, the Sony a7III has a focus area option that can help you get the shot you want with increased precision. 

By understanding the differences between the focus area options, you can make informed decisions about which option is most suitable for your specific needs and photography style. Whether you're a professional photographer or an amateur, the Sony A7III's focus area options can help you get the most out of your photography. They can also help you capture stunning images that you'll be proud to share.