The ISO options available on your Nikon D90 allow you to adjust the camera's sensitivity to light. You may need to raise the ISO value if you take a picture in low light and find that the resulting ...
Nikon's decision to mention their highest ISO, even if very few owners will ever use it, is similar to an auto-maker mentioning a car's top speed, even though few owners will ever reach those speeds.
All of the sample images in this review were taken using the 16 megapixel Fine JPEG setting, which gives an average image size of around 6Mb. It's a shame that the ISO 80 setting on the Nikon Coolpix ...