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Automatic Exposure Control (AEC) is an X-ray exposure termination device. A medical radiographic exposure is always initiated by a human operator but an AEC detector system may be used to terminate the exposure when a predetermined amount of radiation has been received. [ 1 ]
Other drive modes commonly available include self-timer, which takes a picture several seconds after the shutter button is pressed; automatic exposure bracketing, used to take multiple photos each with different exposure settings; and remote shutter mode for use with a remote control accessory to trigger the camera at a distance.
Exposure compensation is particularly useful in combination with auto-exposure mode, as it allows the photographer to bias the exposure level without resorting to full manual exposure and losing the flexibility of auto exposure. On low-end video camcorders, exposure compensation may be the only manual exposure control available.
The construction problem was the low electric power delivered by the photo cell. It was a precision mechanical wonder that a handful of cameras were made which had automatic exposure control driven by a selenium meter, without need of further electronic or electromechanical support, for example the Optima.
In automatic modes the camera determines all aspects of exposure, choosing exposure parameters according to the application within the constraints of correct exposure, including exposure, aperture, focussing, light metering, white balance, and equivalent sensitivity. For example, in portrait mode the camera would use a wider aperture to render ...
I first discovered Somavedic by its beauty and thought it was an art piece for your home. When I dug deeper I found out the device is a chic-looking, glowing orb of glass that claims to neutralize ...
Exposure compensation was available in all exposure modes. Program mode can be biased towards longer or shorter shutter speeds by using the shutter speed dial. Also in program mode automatic flash exposure was fully controlled by the camera: off in daylight conditions, fill in flash with low light, full flash when dark.
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