Manual focus is a camera setting that allows the photographer to adjust the lens focus by hand, rather than relying on the camera's automatic focusing system. This technique gives the user complete control over which part of the image is sharp, making it particularly useful in situations where autofocus may struggle, such as low light or when shooting through obstacles. Photographers often prefer manual focus for creative purposes, allowing them to achieve specific artistic effects or to focus on subjects that are not in the center of the frame. Many professional cameras and lenses, including those from brands like Canon and Nikon, offer a manual focus option for greater flexibility.