Hey guys I have a noob question about aperture, shutter speed and ISO settings when shooting photos (here please use Nikon 17-55 f2.8 as a reference lens) Where do you usually set your apertures, shutter speed and ISO at to produce the most sharp clear photos (without using a flash)? Situations: 1, outdoor with lots sunshine 2, indoor with enough daylight coming in. 3, outdoor, cloudy 4, indoor with less daylight (say it's cloudy outside) 5, indoor without daylight (evening), with normal lighting in the house Thanks! ADD: I use D80, portrait and group of people are my main subjects. Thanks!