How to focus portrait photography

The camera is equipped with a standard lens, that is, the focal length is close to the diagonal length of the film frame. This kind of lens is only suitable for people who shoot the whole body or bust. If it is used to shoot busts or close-ups of the head, it will often cause perspective distortion. If some shots are shot close to the specified shooting distance, they will not be able to bring into clear focus. Therefore, if you want to take an avatar or close-up figure, you need to use a medium-focus or telephoto lens, and its focal length generally needs to be above 1, which is 0 to 2 times that of a standard lens. Take 135 camera as an example, the focal length of the lens needs to be above 105 mm, so that the distance between the camera and the person can be kept above 1 and 5 meters, which can make the focus clear. When taking small group photos indoors, if there is a lack of back-off, it is necessary to use a short focal length lens, but it is easy to appear the defects of being near big and far small and the characters on both sides are slightly deformed.

Portrait photography is a form of photography with characters as the main creative object. Portrait photography is different from ordinary portrait photography: portrait photography takes the description and expression of the specific appearance and expression of the subject as its primary creative task. Although some portrait photography works also contain certain plots, they mainly show the appearance of the subject.