The image gathered through the lens (non-macro lens) is an inverted, left-right opposite and reduced real image. For example, the perspective of a wide-angle lens is too strong, and the perspective of a telephoto lens is too weak, so the photos you take with the former will appear exaggerated phenomena such as "big nose", "pie face" and "long legs"; The person photographed by the latter is more like a piece of paper and lacks three-dimensional sense. These are all examples of being cheated by the camera.

In addition, the optical quality of the lens itself also has a great influence. There is a kind of lens aberration called "distortion", which is divided into pillow distortion and barrel distortion. As the name implies, the concrete effect is that the four corners of the scene are "too sharp" and "too round". Distortion will lead to distortion to a great extent.

Furthermore, when you look in the mirror, what you see is actually a scene in a 3D space close to the real world, and the picture is full of three-dimensional sense. However, the photos taken by the camera can only be seen on the computer all the time, but the 3D scene is reproduced in 2D space, and some distortions are certain. For example, the weakening of the sense of space, the difference of color reproduction, and the deterioration of photo sharpness.

If you want to show your best in a photo, unless you are looking for a very experienced portrait photographer, he can help you realize your wish.

That's basically it. Good luck!

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