A Flash In The Night
Create dramatic evening images with a touch of artificial light
To create exciting images at night, a flash is an indispensable tool. Stunning results are possible by simply using a camera's built-in or auxiliary flash unit. Yet there's so much more that you can do with a flash beyond merely turning it on.
There's no reason to be intimidated about using flash. Today's TTL (through-the-lens) metering systems make it incredibly simple to get well-exposed flash images automatically. Just because it's automatic, however, doesn't mean that the images have to be boring. Flash pictures can be just as compelling as any photo shot under the sun.
To make the most of your flash, it's best to understand how a flash exposure is achieved in a TTL system. In traditional TTL systems, the flash is discharged and the light reflected off the subject returns to the camera through the lens and hits a sensor within the camera body. Based on the ISO sensitivity, the camera quenches the flash as soon as it has determined that sufficient light has hit the subject, all of this occurring within thousandths of a second.