This week we are addressing ISO, the final of the three facets which make up the ‘triangle’ of photography. ISO is a way of measuring the sensitivity of your cameras image sensor to light. The lower the number of the ISO setting is, the less sensitive it is; the higher the number, the more sensitive it is to the light. Higher ISO settings will allow you to shoot in lower light without a flash, but also means more ‘noise’ in the image. However, this can be utilised to add mood and artistic effect, as seen in the above examples.