As previously mentioned, Auto Exposure Bracketing (AEB) allows you to take 3 images of different exposures without having to alter any settings between shots/frames. Most DSLR's allow sequential shots of +/- 3 stops from base exposure. There are some cameras that allow up to 5 stops of AEB.
{"Image Tag 0x5110": "1", "Image Tag 0x5111": "0", "Image Tag 0x5112": "0"}