What focal length lens should I use for portrait photography?

Portrait photography usually uses two types of lenses. Close-up 50/1.4G, long-range 85/1.4G.

50 is generally suitable for indoor photography. It is the focal length closest to the human perspective. Mainly focusing on busts of people within 1-4 meters. Because of the larger aperture, it can be photographed in relatively harsh lighting conditions. At the same time, because it has a large aperture, the depth of field is relatively shallow, and the final blur effect is very good, which can highlight the subject.

85 is generally suitable for outdoor portrait photography, mainly for full-length portraits of people 5 meters or 7 meters away. To put it more simply, it is suitable for photographing people in the distance. The rest of the place is very similar to 50, you can refer to the above content.