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P04 Exposure

Photography Exposure

QuestionAnswer
EXPOSURE the amount of light in "stops" a camera captures to determine how light or how dark the image will appear, based on apperture, shutter speed and ISO settings
STOP the unit of exposure, a doubling or halving of the amount of light entering the camera when changing aperture, shutter speed and ISO
OVEREXPOSED a photograph which appears too white or washed-out to see details or textures in all or parts of the image.
UNDEREXPOSED a photograph which appears too dark to see details and textures in all or parts of the image.
DYNAMIC RANGE the exposure range in "stops" between the lightest light and the darkest dark which can be captured by a camera
CLIPPING (luminosity) loss of detail and texture in dark or bright areas of an image when the exposure exceeds the dynamic range of a device
BLOWN OUT HIGHLIGHTS loss of detail and texture in important bright areas of an image where the pixels are pure white because they were overexposed
CRUSHED BLACKS loss of detail and texture in important dark areas where the pixels are pure black because they were underexposed
BRACKET a technique of taking several shots of a scene using different camera settings to ensure getting a good image
HDR (High Dynamic Range) a software process that combines bracketed images of a scene to expand and enhance shadow and highlight detail.
APERTURE an opening like the iris of the eye, that changes in size to control the AMOUNT of light passing through the lens of the camera.
APERTURE PRIORITY MODE an automatic camera mode where you set the camera's aperture and the meter will set the shutter speed for correct exposure.
DEPTH OF FIELD the distance between the nearest and farthest objects in a scene that appear acceptably sharp in an image.
F-STOP A fraction that measures of the size of the aperture opening on a camera.
IRIS The part of a lens mechanism that can expand and contract to create circular apertures (or openings) that control the amount of light passing through a lens.
ISO / SENSITIVITY A system used to measure and adjust how sensitive a digital camera is to light.
RECIPROCITY when you ADD a "stop" of light entering the camera with one of the camera exposure controls (i.e. shutter), then BALANCE it by taking AWAY a "stop" of light with the other (i.e. aperture)
SHUTTER The device on a camera that opens and allows light to pass to the sensor or film for a set period of time in order make an exposure.
SHUTTER SPEED the length of time a shutter remains open as measured in seconds or fractions of a second.
SHUTTER PRIORITY MODE A camera shooting mode that lets the photographer define the camera's shutter speed and the camera will then set the aperture for a correct exposure based on its light metering.
Created by: dmaww