Photographers often refer to three terms they call the Three Pillars of Photography. Understanding these ideas will give you far greater flexibility when generating your own images.
SHUTTER SPEED
Refers to the length of time that a camera’s shutter stays open to detect light. This length of time is measured in fractions of a second. Short shutter speeds stop motion, while longer camera speeds blur motion.
ISO
Refers to the camera’s level of sensitivity to available light. Higher sensitivity settings allow you to capture images in low-light conditions, but they may lead to more “noise” in the image.
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