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Beginners Guide To ISO Choice

The first two articles in this series described how aperture and shutter speed should be chosen thoughtfully to optimise the quality of your landscape images, but what about the third factor in the exposure triad, ISO? Mike Bell explains

Nearly every landscape photographer sets the ISO at the camera's base ISO and leaves it there. The reasoning behind this decision is that image quality is best at the camera's base ISO, but although this is broadly true, is that all there is to ISO? Not quite.

A brief explanation of what ISO is will help. The acronym stands for International Standards Organisation and dates from film days, when it was an internationally agreed precise measure of a film's sensitivity to light. Doubling the ISO meant the film was…

Read this article, and many more, in High Definition, inside Issue 37 of Landscape Photography Magazine.

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Mike Bell

Mike is a landscape photographer based in Perthshire, Scotland where his photographs have been used by Perth and Kinross Countryside Trust, Visit Scotland, Forestry Commission Scotland and local tourist associations.

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