1。 A tripod should be used to shoot close-ups with a macro lens. When shooting by hand, if the camera moves back and forth slightly after focusing, the scene will become blurred.

2。 The focus mode you are using is single focus, and it doesn't work after half-pressing the shutter to focus normally. Just choose the other two modes. When the shutter is half pressed, the camera will always be in focus, and there will be no blur caused by camera movement.