Canon EOS REBEL T2I Instruction Manual page 56

Shooting Function Settings
[',_,'] Menu
® Movie-recording size
You can select the movie's image size [.... ×.... ] and frame rate [_]
(frames recorded per second). The _ (frame rate) displayed on the
[Movie rec. size] screen switches automatically depending on the
[_: Video system] setting.
image size
[1920×1080] : Full HD (Full High-Definition) recording quality.
[1280×720] : HD (High-Definition) recording quality.
[640×480] : Standard-definition recording quality. The
aspect ratio will be 4:3.
[Crop 640×480] : Standard-definition recording quality. The aspect
ratio will be 4:3. It will give a telephoto effect of
about 7x. This shooting mode is called Movie crop.
Frame rate (fps: frames per second)
[1_0] [1_0] : For areas where the TV format is NTSC (North
America, Japan, Korea, Mexico, etc.).
[_] [1_5] : For areas where the TV format is PAL (Europe,
Russia, China, Australia, etc.).
[1_4] : Mainly for motion pictures.
Notes for Movie crop
Use a tripoa _oprevent hand-helc camera shake.
The Movie crop image cannot be magnifiedfor focusing.
Even if the AF mode has been se[ tc [Quick mode], itwil{ switch
automatically to [Live mode] during movie shooting. Also, in [Live
mode], the AF point is displayed larger than with other recording sizes.
Noise ana dots of light may be more no;_ceablethan in other recording
sizes.
Focusing may De difficult if the AF point covers both a near aria far
subject.
Still photos cannot be taken.
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