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Photography Terms |
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Darkroom
A lighttight area used for processing films and for printing and processing papers; also for loading and unloading film holders and some cameras.
Dedicated Flash
A fully automatic flash that works only with specific cameras. Dedicated flash units automatically set the proper flash sync speed and lens aperture, and electronic sensors within the camera automatically control exposure by regulating the amount of light from the flash.
Definition
The clarity of detail in a photograph.
Depth of Field
The amount of distance between the nearest and farthest objects that appear in acceptably sharp focus in a photograph. Depth of field depends on the lens opening, the focal length of the lens, and the distance from the lens to the subject.
Depth of Focus
The distance range over which the film could be shifted at the film plane inside the camera and still have the subject appear in sharp focus; often misused to mean depth of field.
Diffuse Lighting
Lighting that is low or moderate in contrast, such as on an overcast day.
Diffusing
Softening detail in a print with a diffusion disk or other material that scatters light.
Dodging
Holding back the image-forming light from a part of the image projected on an enlarger easel during part of the basic exposure time to make that area of the print lighter.
Double Exposure
Two pictures taken on one frame of film, or two images printed on one piece of photographic paper.
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