
Bryan Peterson's Understanding Photography Field Guide

The smaller the f-stop number, the larger the lens opening; the larger the f-stop, the smaller the lens opening.
Bryan Peterson • Bryan Peterson's Understanding Photography Field Guide
Now, set the aperture to f/22 and focus on something that’s approximately 5 feet from the lens. Then, if you’re in Manual exposure mode, adjust your shutter speed until the camera’s light meter indicates a correct exposure and shoot. If you’re in Aperture Priority mode, simply shoot, since the camera will set the shutter speed for you.
Bryan Peterson • Bryan Peterson's Understanding Photography Field Guide
Most photographers aren’t inclined to think of the wide-angle lens as a close-up lens, but if they did, their images would improve tenfold.
Bryan Peterson • Bryan Peterson's Understanding Photography Field Guide
With a 12–24mm zoom lens, it’s the 12–16mm focal range. With 18–55mm, 18–70mm, 17–35mm, or 20–35mm lenses, you’ll only call on the 17–18mm range.
Bryan Peterson • Bryan Peterson's Understanding Photography Field Guide
First, you must turn off the autofocus.