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IIncandescent

Incandescent light refers to the illumination produced from typical household light bulbs (tungsten bulbs) incorporating a heated tungsten wire filament. The light produced is “yellow” or a warmer-than-daylight white balance. Setting a camera’s white balance to Incandescent will correct for the yellow cast.

In terms of color temperature, incandescent light generally falls between 2500 and 3500 degrees Kelvin.

Color Temperature

Light Source

1000-2000 K

      Candlelight

2500-3500 K

      Tungsten Bulb (household variety)

3000-4000 K

      Sunrise/Sunset (clear sky)

4000-5000 K

      Fluorescent Lamps

5000-5500 K

      Electronic Flash

5000-6500 K

      Daylight with Clear Sky (sun overhead)

6500-8000 K

      Moderately Overcast Sky

9000-10000 K

      Shade or Heavily Overcast Sky

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Guide Number
Indicates the power of a flash in relation to ISO film speed.
Grayscale
A term used to describe an image that contains multiple shades of gray, as well as black and white. Often used in imaging programs as a synonym for black-and-white.
Graininess
A term particular to film, it refers to the appearance of grain (the structure of a film's coating or emulsion) in a print, transparency or negative.
GN Mode on Nikon Speedlights
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Gigabyte
A gigabyte (gb) is a unit of information equal to 1,024 megabytes or approximately 1,000,000,000 bytes.
Ghost Image or Ghosting
A double image that results from using flash in relatively bright light at a low shutter speed. The two images, one from the ambient light and a second from the flash, do not perfectly coincide.
Gelatin Filter
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Groups of Pictures
MPEG formats use three types of compressed frames, organized in a group of pictures, or GOP, to achieve interframe compression. Find out more.
Gamma
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G-Type NIKKOR Lens
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GPS
Global Positioning System, in which the receiver calculates its position on the earth by timing signals received from GPS satellites.
GIF
Graphics image format. This is a raster-oriented graphic file format that allows the exchange of image files across multiple platforms.
Guide Mode
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