Photo Basics

SLR-

Single Lens Reflex

Shutter Speed-

The slower the shutter speed the more light

The Faster the shutter speed the less light

1second-1/1000 seconds

Depth of field (DOF) -

The lower the F number the smaller the depth of field the larger the hole in the camara

http://www.photonhead.com/simcam/shutteraperture.php