EOS Rebel SL1 Manual

191
k Shooting Movies
When you press the shutter button halfway to autofocus during movie
shooting, the following phenomena may occur.
Focus may become far off momentarily.
The brightness of the recorded movie may be different from that of the
actual scene.
The recorded movie may be momentarily still.
The movie may record the lens operation noise.
You cannot shoot still photos when focus is not achieved, such as when
the subject is moving.
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