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The six basic elements of photography light: luminosity, light position, light quality, light type, light ratio, light color.
Luminosity
Luminosity is a widely used concept. In photography, luminosity is the general term for the luminous intensity of the light source, the illuminance of the light on the surface of the object, and the brightness of the surface of the object.
The intensity of the light source and the irradiation distance affect the illuminance; the size of the illuminance and the color of the surface of the object affect the brightness. In photography, luminosity is directly related to exposure, and conscious overexposure and underexposure also need to be based on accurate exposure. Therefore, only by mastering the basic skills of breadth and accurate exposure can the tone, color and contrast of the subject be actively controlled.
Light position
Light position refers to the position of the light source relative to the subject, that is, the direction and angle of the light.
Light quality
Light quality refers to the gathering, scattering, softness and hardness quality of light. What we usually call hard light and soft light as well as direct light and scattered light are divided according to light quality.
Light type
Light type refers to the role each light plays in shooting. It can be generally divided into the following:
Main light: Also known as shaping light. It refers to the main illuminating light used to display objects, express texture, and shape images.
Auxiliary light: Also known as supplementary light, used to increase the brightness of the shadows generated by the main light, reveal the details of the shadows, thus reduce image contrast.
Modified light: Also known as decorative light. Refers to the strengthened shaping light added to some parts of the object, such as catch light.
Contour light: Refers to the light that outlines the contour of the subject. Backlight and side backlight are usually used as contour light.
Background light: The light illuminates the background behind the subject to highlight the subject or beautify the picture.
Light ratio
The light ratio refers to the difference in the amount of light received between the bright part and the dark part of the main part of the subject, and usually refers to the difference between the main light and the auxiliary light.
In general, the strength of the main light and auxiliary light and their distance from the subject determine the light ratio.
When the light ratio is large, the contrast will be large, which is conducive to the performance of "hard" effects;
When the light ratio is small, the contrast will be small, which is conducive to the performance of "soft" effect.
Light color
Refers to the color or light component of the light, which is what we often call color temperature. Light color is important both in expression and technology, and it determines the warm and cold feeling of light.
The light color determines the overall tone of the photo, which is of great importance in the presentation of the theme.
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