Photography

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.