Exercise: Higher and Lower Sensitivity

I took photographs at a number of settings. The ISO changes as we go down the page above 80, 200, 800, 1600, 3200 and across 1/50, 1/25, 1/10, 1/2.5. Laid out like this they form a short of graph showing the changes. We can see the way the “film” reacts to light and ways in which an increase in ISO also increases the noise in the images and that lower ISO “film” does not cope as well with low light levels. At various points on this graph the images are fine. They capture the detail and the rendering of colour and form are good enough. At the extremes their usefulness is more limited, but there could be times when they are used for effect or need. They should not be forgotten. The noise tends to reveal itself more in the dark areas and shadows of an image. Noise is part of the visual language it hints at covert action, surveillance, when pushed in the right way a printerly look, vintage, old equipment, age, gritty? real??? shooting from the hip?


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Filed under Exercise, Nov 2011

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