Canon EOS REBEL T2I Instruction Manual page 34

Troubleshooting Guide
The built=in flash does not fire.
® If you shoot continuously with the built=in flash at short intervals, the
flash might stop operating to protect the flash unit.
The camera makes a noise when it is shaken.
® The built=in flash's pop=up mechanism moves slightly. This is normal
® If you use flash, the shutter will make two sounds each time you shoot
(p.109).
The movie shooting terminates by itseJf.
® if the card's writing speed is slow, movie shooting may stop
automatically. Use an SD Speed Class 6 "_s@" or faster card. To
find out the card's read/write speed, see the card manufacturer's Web
site, etc.
® Bfthe movie file size reaches 4 GB or if the movie recording time
reaches 29 rain. 59 sec., movie shooting wil_ stop automatically.
When a movie is played, camera operation noise can be
heard.
® If you operate the camera's dials or lens during movie shooting, the
respective operation noise will also be recorded. Using an externa}
microphone (commercially available) is recommended (p.135).
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