You may be surprised to learn that a high ISO can even be helpful on a bright sunny
day. For example, if you are photographing a landscape without a tripod, the shutter
speed can be no slower than 1/125 to prevent camera shake. To achieve great depth
of field the desired aperture would be f11 or f16. This will keep everything sharp from
near to far. With these two decisions made, you may take your photo only to find that
it's too dark. This is where the ISO comes to the rescue. Simply double the ISO number
and watch as the photo gets brighter. Still need more light? Double the ISO again.
32| PicsArt Monthly