How do you work out the correct ISO setting to use for any given subject?
Lawrence Bassett, via email
Jason says... The base ISO setting in the camera’s standard range typically enables the best image quality, with the greatest sharpness and dynamic range, along with the minimum image noise. A lower ‘expanded’ ISO setting may be available but this is likely to reduce dynamic range. Even so, you can use this if you want to use a wide aperture and the lighting conditions are too bright to avoid over-exposure.
It’s more likely that you’ll need to increase your ISO under dull lighting conditions, in order to get a sufficiently fast shutter speed to avoid motion blur. It’s worth the sacrifice of decreased fine detail and increased noise. The Auto ISO setting in Nikon cameras works well, increasing the ISO by the necessary amount to ensure optimum image quality.
The Auto ISO setting works well in dull or indoor conditions, maintaining sufficiently fast shutter speeds for handheld shooting