Is the portrait lens telephoto or short?

Portrait photography can take wide angle, head shot, medium focus, telephoto and even fisheye photos. Depends on what kind of effect you want. According to the general aesthetic point of view, the distance from 1.2 meters to 1.5 meters is the most beautiful to see a person's five senses-because the perspective effect of this distance makes a person's nose look slightly smaller than it really is, and his face is not peaceful. Moreover, when taking pictures of people, it is customary to only take pictures of people's heads and shoulders. Therefore, the standard portrait lens we refer to generally refers to the lens that shoots people at a distance of 1.5m-2m, that is, the lens of 50mm- 135mm. The longer one is ok, but it is difficult to communicate with the person being photographed because of the long distance. As the distance approaches, the deformation occurs again. A good head is a lens that is easy to communicate with the subject and has no obvious deformation. 50mm- 135mm will do. 135 85mm is best for cameras. 100mm is not bad, 135mm is a bit far. For 135 camera or Quan Huafu, the 85mm~ 135mm lens is recognized as a portrait lens. For APS-C camera, because the image field obtained by the same lens is smaller than that of 135 camera, the lens of 135 camera with a focal length of 50 mm to 85 mm is the portrait lens of APS-C camera. What if it is a child? It stands to reason that we should use a lens with a larger focal length (larger magnification) than the ordinary portrait lens, so that children's heads and shoulders can fill the whole image field. However, because children's facial features are not as prominent as those of adults, we can shoot at a closer distance without affecting the appearance, so we can shoot at a distance of 1 meter with the ordinary portrait lens. Canon EF 85/ 1.2L II USM, Leica M75/2 APO ASPH, Nikon AF85mm/ 1.4D and Minolta AF85mm/ 1.4G are the most representative portrait lenses in 135 cameras.