TAILIEUCHUNG - Kỹ thuật chiếu sáng (English) - Lighting Techniques

In lighting there are two goals: get enough light; use the light you have to shape and define objects in the scene. Lighting is often tried out "on paper" by using a lighting diagram before it's actually set. Many potential problems can be spotted in the process of constructing a lighting diagram. The most common of these is to light for a theoretical "stage front" instead of lighting for specific camera positions. It's also useful in anticipating problems with shadows falling where they're not wanted. Every light casts a shadow. The lighting diagram will make it easier to see where. | Kỹ thuật chiếu sáng English Lighting Techniques In lighting there are two goals get enough light use the light you have to shape and define objects in the scene. Lighting is often tried out on paper by using a lighting diagram before it s actually set. Many potential problems can be spotted in the process of constructing a lighting diagram. The most common of these is to light for a theoretical stage front instead of lighting for specific camera positions. It s also useful in anticipating problems with shadows falling where they re not wanted. Every light casts a shadow. The lighting diagram will make it easier to see where those shadows might fall. One man One Camera The simplest type of lighting involves one camera shooting one subject. The subject is placed in the setting far enough away from any walls or backdrops to avoid casting shadows on the background near the subject. The camera is set up placing the subject in front of the backdrop. Key Light The first light set is usually the key light. It s positioned thirty to forty-five degrees to the side of the camera and should strike the subject at an angle of about forty-five degrees from vertical. This lighting angle is best for people with normal features. People with short noses or weak chins should be lit from a steeper angle to increase the length of the shadows cast under the nose or chin. Those with long noses should be lit with less angle to produce shorter shadows. Moving the light closer to the camera will reduce the amount of modeling in the face and make the subject appear heavier than he is. Conversely moving the light farther from the camera will throw more of the face in shadow making it appear narrower. The key light is focused on the subject by putting the bulb in the full spot position and centering the beam on the subject. The light is then flooded out until a reasonable overall level is reached. Reasonable means you can generate sixty to seventy IRE units of video on faces with minimal video

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