How to setup my studio

When setting up light kits, we would never ignore the key light. Literally speaking, the key light is the most important light and will definitely impact much on the whole atmosphere of scene. In general, using key light is to outstand the shape of the subject, however, in order to obtain some special effects, it's often accepted by variously using key light.

To properly represent subjects, photographers can depend on the desired effect to choose "hard" or "soft" key light. The key light can directly illuminate subjects or passes through the subjects. Furthermore, if just use key light only, it will result in a high-contrast scene, especially in the dark background. At this moment, using some fill light is a way to make up if necessary. Although using fill light would decrease the contrast of scene, audience can see more details to the dark background instead. The key light can come from natural light sources, like sunlight, or artificial light. Natural light is commonly used for outdorrs, and artificial light for indoor scene. Certainly, sometimes natural light can't reach enough brightness, photographers can also use artificial light to make up.
Along with the Key Light, the Fill Light plays a role softening and extending the illumination produced from the Key Light. Also, the Fills usually come from opposite angle to the Keys with the height lower than the Keys.
The brightness of the Fill is abround 50% or less than the Key, and the shadow increases while the ratio of the Fill diminishes.

The occasion to use the Back Light is giving a bright, clear outline to the subject. The Back could also help you to seperate the object from the background. Sometimes a point light source would be applied as a Back to emphasize any parts of your subjects, like hair and shoulder, giving the objects a rim of light.

The Key, Fill and Back Lights are major for a three-point lighting setup. The addition of a fourth light, the Background light, completes a four-point lighting setup. The usual elements of a background are chroma keys, ordinary walls, or outdoor scenery. They are not always meant to be eliminated in portrait and other modern photography. A Background Light would draw more attentions to the backgournds making a composition of a shooting.
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