The Xiaomi 15 is equipped with a large sensor and a wide-aperture camera, which allows for greater light intake and enhances low-light photography. However, due to the nature of wide-aperture lenses, only the area in focus remains sharp, while objects farther from the focal point can appear blurred. This effect, known as background blur or depth of field, is a common optical characteristic and is more pronounced when shooting close-up subjects. If you want to achieve clearer images, try positioning the subject in the center of the frame or manually tapping to focus on the desired area in the preview screen. This will help the camera lock onto the subject and improve image sharpness.