Basic knowledge of portrait photography

Portrait photography is one of the few special photography that needs to be shot with clear focal length. Professional photographers mostly use short zoom lenses to shoot people, and their favorite focal length range is about 85- 1OOmm. In fact, a telephoto lens with a length of 85 ~ 1 oomm is usually called a portrait lens, because it allows the photographer to shoot at a good shooting distance (3-4m away from the subject, leaving some space for himself and the subject, but still filling the scene with the subject). More importantly, shooting with a focal length of 85 ~ 1 oomm can eliminate the problems caused by using wide-angle lenses. Some portrait photographers insist that the focal length of 85mm is the best focal length for portrait photography, while others think that the focal length of 100mm is the best focal length. Professional photographers argue about this matter in online forums every day. You can try two focal lengths with the zoom lens, and then choose the one you like best, because both focal lengths can take satisfactory portrait photos. So I won't start a war here. (Note: The zoom lenses of Nikon and Canon cameras are 28- 105 mm, which is very suitable for photographers, because you can choose 85mm, 100mm or the focal length between them). Another reason why short zoom lenses are very suitable for portrait photography is that you don't have to move the tripod or change the camera mode every time you need to re-compose. Therefore, having a zoom lens with a focal length of 85- 105mm can complete shooting well.