What is macro photography? What is thematic photography? What are manual and automatic in the camera?

It is called macro photography because it is necessary to reduce the focal length of the lens to a very short distance when shooting very tiny things such as bacteria and flowers. Theme photography is to produce photographic works according to certain needs, such as landscape photography, portrait photography, and photography of the fiftieth anniversary of the founding of the People's Republic of China. Manual and automatic are generally relative to SLR cameras. Manual refers to setting and adjusting shooting modes such as aperture, shutter, focal length and exposure. Automatic means to select the established shooting mode and let the camera shoot by itself according to the settings. There is also fully automatic shooting, commonly known as fool shooting.