Manual focus is a photography technique where the photographer adjusts the lens focus by hand, rather than relying on the camera's automatic focusing system. This allows for greater control over the focus point, enabling the photographer to achieve the desired sharpness and depth of field in their images. Using manual focus can be particularly beneficial in challenging lighting conditions or when photographing subjects with low contrast. It is commonly found on many types of cameras, including DSLRs, mirrorless cameras, and film cameras, allowing photographers to fine-tune their focus for creative effects.