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.
Lenses are actually a really complicated thing to talk about—if your job was to steer photons through tunnels of stretched glass, people would call you complicated too—so we're gonna try to keep it to field basics, you should know to get around, rather than dive into the crazy physics and mathematical ratios and stuff.
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