Aperature is the opening in the lens that allows light in, and it can be made larger or smaller. A critical attribute of a lens is how large that opening can become, which is called an f-stop.
The f-stops are broken out like so: F2.8 F4 F5.6 F8 F11 F16 F22 F32. Sliding along this scale (right to left) is called stepping up or stepping down. Each step results in a 50% light penetration difference.
Smaller aperatures result in larger depths of field. Closing the aperature by one f-stop gives you approximately 40% more depth of field.
A really basic photography resource for those wanting to know the fundamentals.
I love this more than I should, but it's not enough.
Phenomenal video, taken with DSLR.
Really helpful for me, and hopefully others as well.
Earlier tonight I placed my order for my first true DSLR camera--the Nikon D7000.
As for extras, I ended up with two lenses (basic telephoto and a 1.8f 35mm), a cheap bag, a lens cleaning kit, and an extra battery.
I'm very enthused to get started...
Mt. Shasta's shadow during sunrise, as seen from the top of Mt. Shasta.
Stunning.