Are you a beginner to photography ?
Check the links below :
Understanding exposure : part1 – part 2 – part 3
Aperture, shutter speed and ISO, the big 3 that usually cause the most confusion early on. If you can get a grasp on how the big 3 work together to affect your exposures, taking pictures will be a much more pleasant experience and will have a lot less frustration. Once you understand it, it is like riding a bike. – MattBango.com
