Canon rebel t3 说明手册 (en)

k Shooting Movies
This camera is compatible with the function turning on the LED light 
automatically in low-light conditions. For details, see the EX 
Speedlite’s instruction manual.
Using an EX-series Speedlite (Sold Separately) Equipped with a LED Light
In the movie shooting mode, you cannot take a still photo even if you 
press the shutter button completely.
During movie shooting, do not point the lens toward the sun. The sun’s 
heat can damage the camera’s internal components.
Cautions for movie shooting are on pages 150 and 151.
If necessary, also read the Live View shooting cautions on pages 
136 and 137.
A movie file is recorded each time you shoot a movie.
The image’s field of view is approx. 99%.
The ISO speed, shutter speed, and aperture are set automatically.
AE lock is possible by pressing the <A> button (p.105). To cancel AE 
lock during movie shooting, press the <S> button.
By holding down the <O> button and turning the <6> dial, you can 
set the exposure compensation.
When you press the shutter button halfway, the exposure setting 
displayed at the screen bottom is for your reference.
The sound will be recorded by the camera’s built-in monaural 
microphone (p.140).
The sound recording level will be adjusted automatically.
With a fully-charged Battery Pack LP-E10, the total shooting time will be 
as follows: At 23°C/73°F: Approx. 1 hr. 50 min., At 0°C/32°F: Approx. 
1 hr. 30 min.