The Rebel T2i's built-in flash has a guide number rating of 43 feet (13 meters) at ISO 100, translating to a range of about 12 feet at ISO 100 with the kit lens at wide-angle (at f/3.5) and about ...

*Note: Buffer clearing times measured with a SanDisk Extreme III 30MB/sec 8GB SDHC card. Slower cards will produce correspondingly slower clearing times. Slow cards may also limit length of bursts ...