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Ambient Light
Light already existing in an indoor or outdoor setting that is not caused by any illumination supplied by the photographer.
Aperture
Opening in the camera that lets in the light.
Aspect Ratio
The ratio of width to height in photographic prints; a ratio of 2:3 in 35 mm pictures produces photographs most commonly measuring 3.5 × 5 inches or 4 × 6 inches.
Camera Angles
Various positions of the camera (high, medium, or low; and left, right, or straight on) with respect to the subject, each giving a different viewpoint, perspective or visual effect.
Capture
The process of recording data, such as an image, video sequence, or audio stream.
Color Correction
To correct or enhance the colors within an image.
Contrast
The difference in darkness or density between one tone or another.
Cropping
Removing portions of an image that are outside the area of interest.
Depth of Field
The area between the nearest and farthest points from the camera that are acceptably sharp in the focused image.
Evidence Quality Photos
Images of sufficient size and quality to allow comparison and examination by a qualified forensic expert.
Exposure
The quantity of light allowed to act on photographic material; a product of the intensity and duration of light striking the film or sensor.
F-stop
Lens setting number indicating the size of the aperture that allows light into the camera.
Filter
A colored piece of glass or other transparent material used over the lens to emphasize, eliminate, or change the color or density of the scene.
ISO Speed
The sensitivity of a given film or sensor to light, indicated by a number.
Lens Speed
The largest lens opening at which a lens can be set.
Raw File
The data captured by a digital camera sensor before it is converted into an image file.
Resolution
In a digital photograph, the number of pixels which make up the image.
Scale
The relative size of an object as compared to other objects in general proximity.
Shutter
Blades, a curtain, plate, or other movable cover in a camera that controls the time during which light reaches the film.
Working Copy
A copy or duplicate of a recording or data that can be used for subsequent processing and/or analysis.