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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.

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Why is the earth not overexposed in this star photo from the ISS?

Assuming this is a single exposure, it must have been taken on the night side of the Earth, and the impression of daylight can be caused by the moon, like in those night time photos. …
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7 votes

How does software exposure compensation work in RAW files?

When it comes to exposure and balance, RAW files just store more information about colors, than JPEG files do. … Either way, these colors consist of Red, Green, and Blue values and by manipulating these values you can always adjust white balance or exposure, regardless of the file type... in the ideal world. …
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-3 votes

Why doesn't the picture become darker the more you zoom in?

When the automatic exposure mode is used, your camera simply compensates for the darkening by adjusting exposure time, ISO, or aperture. …
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11 votes

Could a "universal exposure" setting be practically possible?

The original question is based on incorrect assumption (about digital sensor not changing state during the exposure) but the concept is related to the Quanta Image Sensor (QIS) idea researched by Eric … Such device would (quoting the question) "remember" what the sensor readings were at every exposure point and having the complete data set we could for example "change" the effective exposure time …
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3 votes

Why can't digital camera sensors expose each photosite individually?

It only appears to be better than our current high end cameras, because our brain constantly merges "snapshots" taken using different exposure settings. …
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1 vote

How can I bump up shadows in post without overexposing the image?

Is there a setting that will make both images work? The setting is called "High Dynamic Range", perhaps with tonemapping (depending on the intended output). Modern cameras (like Google Pixel 3 or …
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