What is the virtual reality of portrait photography?

Obviously, there is a difference between motion and stillness.

The so-called virtual reality is determined by the size of the aperture: the change of the aperture size can not only change the transmission of light, but also control the depth of field. Especially in portrait shooting, the requirement of depth of field is emphasized. Because the maximum diameter of the aperture is mainly affected by the lens size of the lens, if you want to enlarge the aperture, you must enlarger lens under the standard specifications, and enlarger lens will lead to more expensive costs and manufacturing expenses. In the world of traditional cameras, if the aperture is larger than the previous level, the price will often rise in proportion. Therefore, no secular lens can have all the apertures when it is manufactured. For general-purpose 35mm camera lenses, the aperture is mostly from f/ 1.4 to f/22. Only the aperture of the special lens of the large camera (4X5) is as small as f/64, but the maximum aperture is also limited to f/5.6.