#1 / This first image shows just the background light. This light illuminates the background only and will keep any dark clothing that the subject may be wearing or her dark hair from blending in with the background. It also removes any shadows that may be cast from the main or fill lights.
#1 背景光
#2 / This second image shows what the hair light does, which is illuminating the hair! It is above and behind the subject aimed down and will keep the hair looking healthy. A soft box could also be used. A small amount of spill on the shoulders is permissable but should be avoided if possible.
#2 髮燈
#3 / The third light is the kicker light (also known as the accent light or garlic light) and "kicks" some light onto the side of the subject's dark hair opposite of the main light side. This light should "connect" with the hair light and the main light so the hair is lit from all sides (wrap around lighting) and will make the subjects hair look great and keep it from blending in with a dark background.
It is also used on males to just graze the side of his face (it is called "Clint Eastwood" lighting when used in this fashion) and will outline the masculine jaw. It is occasionally used on women in the same fashion and for the same purpose. It should "kiss" the subject, not blast them, and when used as a kicker on long haired women should not encroach onto the cheek, nose, shoulder or chest.
#3 側面燈
#4 / The fourth light is the main light. The main light provides contrast from one side of the face to the other because it is more powerful than the fill light and will cast a shadow onto the opposite side. It should only illuminate the subject. A broad light source (such as a softbox) will cast a soft shadow. A hardlight source (such as a straight 16 inch parabolic reflector) will cast a harder shadow. The closer the light source is to the subject the softer the light appears.
#4 主燈 F/11
#5 / The last light is the fill light. The fill light is a broad light source usually placed behind the photographer and fills in the shadows. This light should provide illumination to everything the lens of the camera will "see." This light will guarantee that your blacks will register with detail on your print. The fill should follow the nose. A fill metered at 2 stops less than the main will give you approximately a 3 to 1 ratio of highlight to shadow.
#5 補光 F/5.6
"Clamshell" lighting is popular because it typically renders a flattering 1:1 lighting ratio, particularly with women.
If you look through any fashion magazine, you will find many examples of this type of lighting in hair and make-up ads, as well as many others.
This setup can be really simple consisting with just one light setup,
with a large soft modiflier such as a very large Softbox. typically set in front and above the subject
Then a large Reflector will be used as fill lighting, @ about 45 degrees under the main light and the subject.
Typically a light color background is used so the background also acts as a reflector to get seperation between the background and the subject's hair and body.
some great results can be achieved with only one light source and a reflector as the fill.
following are some examples of Clamshell lighting set-ups from various sources across the web.