A method and an apparatus are disclosed for bringing a portrait camera having a fixed-focus taking lens into coincidence with an optimum camera-to-subject distance appropriate for the lens regardless of differences in the size of a person's head to be photographed. According to the invention, a finder frame through which a person's head may be viewed can be set to one of several alternative settings corresponding to respective head sizes, for example small, medium and large, to select the particular setting that best matches the size of a person's head to be photographed at the optimum camera-to-subject distance. Then, the specific distance between the portrait camera and the person's head to be photographed is adjusted until the person's head, when viewed through the finder frame, appears to fill the finder frame.