Why do I feel that different cameras even take pictures at different times and have different faces? I took it that day. It doesn't feel like it.

First of all, the photos taken by different cameras and different lenses are really different, because the lens will stretch more or less, and the stretching effect of different lenses is different, just like some people are not fat, but the face taken by the lens looks big, and the distance of the lens will also affect the stretching. Let's talk about time. People will change in a day, and the changes will be subtle, but you can look carefully. For example, when you wake up in the morning, your facial features will be completely changed, and the light and shadow during the day will also change. The angle of sunlight changes every day, and so does the shadow. When you take photos indoors, the light angle will be different. Finally, the shooting angle is one of the most important factors leading to the difference. From top to bottom, the angle will be thin, and from bottom to top, it will be fat. Everyone's left and right faces are different, and it's different to shoot from the left or from the right, and even some people will be very different. If you put aside other factors and only look at the five senses, there is no difference between your two photos.