Using Your Camera's Settings: Program Mode, Shutter Speed, and More
Attend any digital photography workshop, and inevitably you'll hear questions about digital camera
exposure controls . Photographers want to know: How are aperture priority and shutter priority modes different. Knowing which mode to use for specific photographic situations, and how your camera
's various controls interact with each other can help you take dramatically better photos, and more easily, to boot. Program vs. Auto Modes Your camera
's Program and Auto modes are clearly different--for one thing, camera manufacturers are unlikely to create two modes that do the exact same thing. Here's a typical camera settings dial, where you can see Auto, P (Program), S (shutter priority), A (Aperture priority), N (Manual mode), and others:.