Galaxy phone or tablet camera does not focus on the subject
When you want to take a picture, your camera should focus on a subject when you touch it on the screen. If Tracking Auto-focus is on, your camera will be locked to that person or item for 3 seconds. Because it is focusing on one thing, it may seem like the camera is not focusing on the entire scene. This can be prevented by turning off Tracking AF. Cleaning the camera's lens will also help.