Still confused about aperture and shutter? In lieu of a lengthly explanation, just go to the SlimCam and play around with the settings. You’ll get instant feedback on what a picture will look like without having to actually go take the pictures. Neato!

Note: I think the blurring shown at small apertures (f22) is to mimic camera shake, not diffraction. I could be wrong, but if they’re trying to show the effects of diffraction, it’s VERY exaggerated. Don’t fear small apertures if you have lots of light or are using a tripod.