Photography means a process or method for generating images or photographs of an object by recording the reflection of light that is on the object on a light-sensitive medium
a photographer can adjust the intensity of the light by changing the combination of ISO / ASA (ISO Speed), Diaphragm (Aperture), and Speed of Rana (Speed). The combination of ISO,
Diaphragm & Speed is referred to as exposure. In the era of digital photography where the film is not used, the film speed that was originally used developed into Digital ISO.
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