shutter speed
shutter speed exposure time is the length of time when the digital sensor inside the camera is exposed to light, also when a camera shutter is open when taking to photograph. the amount of light that reaches the image sensor is proportional to the exposure time. the average camera speed is usually 1/60.
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ISO
IN digital photography Iso measure the sensitivity of the image sensor. The same principles apply as in film photography -the lower the number the less sensitive your camera is to light and finer the grain.
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