On Cameras, Lenses Make the Difference

"When most of us talk digital cameras, we talk megapixels, ISO, image noise, shot-per-second speed and image processing. We're tech geeks. But really, none of that stuff matters as much as your camera's lens.The lens is, after all, your camera's eyeball-the image sensor or film can only record what comes in through the lens. It's what defines the picture's perspective, clarity and way more."

This article does a good job of explaining camera lens terminology and why a good, expensive lens takes a much better picture than a cheap lens. It also explains why lens cost so much and why they won't be going down in price any time soon. The thing I liked best, though, was the embedded video on how lenses are made and assembled.  That was fascinating!