Why does the Xiaomi 15 sometimes lose focus when taking portrait photos?
The Xiaomi 15 uses phase detection autofocus (PDAF), which relies on phase difference information to drive the lens to the correct focus position. In challenging lighting conditions, such as strong backlight, the subject can be in a darker area, making it difficult for the autofocus system to acquire sufficient phase information. This can result in slow focusing, difficulty locking onto the subject, or slight focus inaccuracies. To improve focus accuracy, try adjusting the shooting angle to ensure better lighting on the subject or take multiple shots to increase the chances of capturing a well-focused image.
Does it help?
Yes
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