One of the great hidden features on digital cameras is the fill flash or flash on mode. By taking control of the flash so it goes on when you want it to, not when the camera deems it appropriate, you've just taken an important step toward capturing great outdoor portraits.
In flash on mode, the camera exposes for the background first, then adds just enough flash to illuminate your portrait subject. The result is a professional looking picture where everything in the composition looks good. Wedding photographers have been using this technique for years.
After you get the hang of using the flash outdoors, try a couple variations on this theme by positioning the subject so the sun illuminates the hair from the side or the back, often referred to as rim lighting. Another good technique is to put the model in the shade under a tree, then use the flash to illuminate the subject. This keeps the model comfortable and cool with no squinty eyes from the harsh sun, and this often results in a more relaxed looking portrait.
Remember, though, that most built-in camera flashes only have a range of 10 feet (or even less!), so make sure you don't stand too far away when using fill flash outdoors.
Figure 3. By placing the subjects in the open shade beneath a tree and turning on the fill flash, both the boys and the background are properly exposed. (Canon PowerShot G2, 1/250th at f-4, flash on)
