The ISO setting affects how sensitive the camera’s sensor is to the light that falls on it. It is the third element in the triangle that determines the overall exposure of the image, alongside aperture and shutter speed. ISO stands for the International Standards Organisation, and harks back to the days when photographs were captured only on film, rather than a digital sensor. The ISO ratings created an industry standard for the sensitivity of different film types. ISO 100 film …
Exposure is the technical term for the creation of a photographic image. An exposure can be deemed underexposed, correctly exposed or overexposed although, as photography is a creative art, this is a subjective judgement. Therefore, a correctly exposed photograph is one that is as the photographer intended. An underexposed image has darker tones than it ‘should’ have, while an overexposed one is too light in tone. An exposure is created through the combined effects of the aperture, shutter speed and …