iso

low isos give you buttery-smooth shots, whereas higher settings dish up progressive amounts of noise. But colours can also be less faithful at higher settings, as well as there being a drop-off in dynamic range (the amount of detail captured from the shadows to the highlights). Your camera can apply noise reduction to reduce the grittiness of pictures shot at high ISOS, at the expense of some detail being lost as the camera ‘smooths’ the image.