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  • Legal Colors

    Broadcast requires standardization of certain video characteristics. One such requirement is the range of legal colors. Specifically, values between 7.5 and 100 IRE units are considered broadcast-safe. Colors in this range display on common TV monitors and do not create artifacts such as audio noise and color smearing.

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  • Letterbox

    Black bars, or mattes, above and below an image. Letterboxing is usually used to display images with widescreen aspect ratio on standard-width video formats while preventing distortion of the image. Some cameras offer an option to shoot in letterbox for aesthetic purposes.

    courtesy of Wikipedia

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  • Light Meter

    An electronic or analogue device that takes measures the amount of light and is used to determine proper exposure. The light meter uses ISO (or, for film cameras, the film stock’s light sensitivity) and the shutter speed to determine the appropriate f-stop or aperture setting. This reading is then set on the camera to capture an image with proper exposure.

    courtesy of Wikipedia

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  • Lighting Ratio

    In a standard three point lighting set up, the lighting ratio is a ratio of the key light to the fill light. Lighting ratios are determined by using a light meter to take a reading of the illumination produced by one source while the other is blocked. Lighting ratios describe the amount of contrast in a lighting set up. A high lighting ratio indicates high contrast while a low ratio indicates low contrast.

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  • Low Contrast Filter

    A filter that is mounted on a lens to reduce contrast by lightening shadows.

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