CameraCrazy

I wanted to pass this website along that I found quite a while back. Tamron has a great online Depth of Field tool that allows you to get familiar with how Depth of Field Changes when you change the aperture and lenses’ focal lengths. In general, the bigger the aperture (lower F-stop number) the less DOF. Likewise, the larger the focal length on a lens the less DOF. If you’re fairly new to ideas about DOF, check out the website and play around to get a sense of how photographs can change depending on aperture and lens focal length.

Better yet, grab your camera and a lens or two and try it out for yourself.