Lens analysis power and depth of field

There is a dialectical relationship between lens analysis and depth of field. Generally speaking, aperture, speed and distance must be learned and used flexibly. The larger the aperture, the smaller the depth of field, and the smaller the aperture, the larger the depth of field. is inversely proportional. The larger the aperture, the greater the exposure, and the smaller the aperture, the smaller the exposure. Learning how to control the camera manually can improve your photography skills, and through slow exploration, you will create high-quality works. Blindly taking pictures in automatic mode will always have shortcomings. Still need to learn some basic knowledge of photography.