Aperture and Shutter - Science of the F-stop

[mitzs]

We all use cameras in our day to day lives. However, most of us know nothing more about the devices than "point and shoot". If you ever wondered how to take portrait photos of a subject with a blurred background, or how they take those pictures of trailing lights or water across a landscape, keep reading.

http://www.picturecorrect.com/photographytips/208/aperture_fstops_camera_settings.htm