A true master of reflector use
Generally, the most commonly used reflector is this area of ​​decreasing brightness. Using this area, you can play any illumination effect you want.
People have usually seen many failed reflector films, and many friends have posted such films here. The most common problem is that as soon as it is said that the reflector is used to fill the light, it does not matter whether the light from the reflector is reflected on the MM's face. The result is that either the MM face is overexposed or the background is underexposed. (Of course, when the background is also relatively bright, maybe not) It also made MM unable to open his eyes.

It is not advisable to hit the reflector without paying attention to the correct use of the reflector. Of course, relatively correct, it is quite difficult to properly lay the reflector. Because the use of a reflector to fill in the light is equivalent to adding a light source to the subject, which is the same principle as using flash or indoor studio lights. The light can control the output power at will, but the reflector is not so easy to control. Can you say you reduced the output of the reflector by 1 stop? Or let the person playing the reflector? Even if you use the light meter to control the light ratio to 1:2, as long as the person hitting the reflector moves a little, the 1:2 you just measured may become 1:3 or only 1:1.5.

Only a real reflector expert, such as a veteran lighting engineer (worker) in a film studio, can do it. He only needs to look at the background you choose, the MT's Pose, and the focal length you use, and he knows about the Which position to hit the reflector, and then lift the reflector, you can hit the same. You just need to make some minor adjustments, "skim a little more; a little more". Even if you talk to MM, and he puts the reflector down and lifts it up again during the actual shooting, it's still basically the effect you just adjusted. That's the real Pro.

When photographers generally shoot, it is difficult to have such a master to play the reflector for you. Therefore, controlling the light reflected by the reflector has become the biggest problem in the general use of reflectors to fill light. In the final analysis, the reflector is used to control the light ratio. And this problem of controlling the light ratio is not a problem that can be explained in a few words here. You can only rely on your own experience and feelings and the characteristics of MT to make judgments. This experience and judgment ability can only be improved by relying on film and continuous practice with one's own understanding. Or rely on an expert, the teacher is around to guide.