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Exposure is the total amount of light allowed to fall on a sensor or film during the taking of a photograph. This is determined by the exposure time (shutter speed) and amount of light admitted (lens aperture). Today, sensor/film sensitivity (ISO speed) is often also considered to be part of exposure.

4 votes
2 answers
2k views

How to set exposure for photographing a high-contrast subject?

the flash on low power (either using the external flash with the main reflector pointed in some oddball direction, and the secondary reflector set to low power; or the built-in flash setting the flash exposure … What I do is try to expose towards the high end of the histogram, and then later on adjust the exposure and curves to try to bring out some detail in the darker areas during postprocessing. …
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1 vote

Could a "universal exposure" setting be practically possible?

In other words, exposure to full saturation is impractical in many cases, and exposure to make the AE system happy is inadequate in many cases. … access to exposure compensation settings. …
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6 votes

Why do I get inconsistent results with Canon ETTL flash?

The example photos you posted look fine to me, both in terms of exposure (which is easy to judge) and color balance (which is more difficult to judge). …
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