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P04 Exposure
Photography Exposure
| Question | Answer |
|---|---|
| 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. |
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