When you see that pop-up flash built into your sexy new digital SLR, it's easy to imagine that you've got your lighting bases covered. However, you'd only be half-right. A built-in flash, no matter how short its throw or arrow its angle of coverage, is better than no flash at all. Built-ins are useful in emergencies. They're also great when you want just a touch of fill-say, a glint in a portrait subject's eye-or for triggering slave-activated, off-camera strobes quickly and conveniently.
