These terms may have complicated names, but they are an essential part in composing good photographs. Today, I'm going to give you an overview of what they mean, and how they affect your photographs.
Shutter Speed
More simply put, "Shutter Speed" is the speed that the shutter closes when you press down on that button on top of the camera. The slower the shutter speed, the more light allowed to be tracked the image sensor. The more light that is allowed to be tracked by the camera's image sensor, the brighter your photographs will be.
This aspect of the camera is especially important to photographers that shoot in low-light situations, because they need to be able to let an adequate amount of light into the sensor without shaking the camera with their hands.
To aid in this struggle, photographers often use flash bulbs or "Speedlights"
Aperture
The aperture of a camera is the hole within the camera's lens. In simple terms, this means that you need a wider opening to achieve a desirable brightness in low-light conditions. In sunlight, this opening may be smaller. The Aperture directly affects photographs by means of "Depth of Field," but I'll save that until next time.
Spirit Check '09
Taken By Me w/ a Nikon D90 DSLR
A fast Shutter Speed was required to capture movement.
Very good thus far. Be sure to proofread, there are a few simple errors. Wonderful tone to your voice. If you're going to try and teach, maybe you should show examples of control and/or lack of control of each device. For instance, speed would be a blurred image of a runner with a clear image of a runner. And remember links to more information for your readers. You don't always have to use your images to teach a subject. Mix 'em up if you'd like. Thus far: B
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