How to take high-profile, low-key and mid-range photos in the studio?

High-profile: people keep a certain distance from the background, the background uses stronger light, and people measure light. The background is overexposed to form a bright tone, but remember that the brightness of the background should not be too strong than the main body of the character, otherwise the highlights will overflow and the picture will be foggy. In addition, be exposed to the dark parts of the characters. Because there are few external exposure meters in modern photo studios, photographers often deal with them by experience and add another exposure after routine metering.

Low-key: the distance between the characters and the background is widened, and the background is darkened as much as possible. At the same time, the light of the character should not reach the background as far as possible, and the light should be measured by the bright part of the character. The background exposure is seriously insufficient to form a dark tone, which is a low-key picture.

Middle tone: gray background, always shining, too lazy to continue.