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A7III Face Detection with Non-native Lenses

clayton.lam
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clayton.lam Newbie

clayton.lam

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Hello there, I'm currently using the Sony A7III with Samyang AF 14mm f/2.8 FE.

It might be a stupid question for you but whenever I am taking video with 'Face Detection in AF' on (AF-C mode, video format: 1080p, 50 fps), the face always has a grey frame on it. But it does not focus to it, I tried so many times but still did not make it happen. I tried focusing on other things, then moved to the face. The frame happened to appear again, but the focus point did not change a bit. I had to press the shutter to make it focus.

Is it because of the non-native lens, or is it a problem of my A7III???

Thank you for your kind reply.

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Canon_dork Rookie

Canon_dork

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I'm new to Sony, but from my understanding of how face detection works, it will display a gray box around a face that it detects, but if whatever autofocus mode you've selected does not cover this area of the frame, it will not actually focus on the face it detected. This would be useful I guess if you have someone's face in the photo, but you actually want to focus on something else.

 

Changing to the most broad focusing area that covers the whole frame should allow the camera to focus on any face as soon as it detects it.

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clayton.lam Newbie

clayton.lam

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I'm new to Sony, but from my understanding of how face detection works, it will display a gray box around a face that it detects, but if whatever autofocus mode you've selected does not cover this area of the frame, it will not actually focus on the face it detected. This would be useful I guess if you have someone's face in the photo, but you actually want to focus on something else.

 

Changing to the most broad focusing area that covers the whole frame should allow the camera to focus on any face as soon as it detects it.

 

Thank you it somehow worked, just that I tried using different Focus Area options and putting objects into the area and taking it away, it changed the focus when I put things close, but it did not focus again when I took the object away. Is that really normal because I thought it would focus the background again when the Focus Area (let's say the Flexible Spot) is somewhere far.

Thank you so much!!!

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