Canon EOS-1D Mark IV User Manual
Page 153
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Movie Shooting Cautions
Recording and Image Quality
• If the attached lens has an Image Stabilizer, the Image Stabilizer will
operate at all times even if you do not press the shutter button halfway.
The Image Stabilizer may cause the total movie shooting time or the
number of possible shots to decrease. If you use a tripod or if the Image
Stabilizer is not necessary, you should set the IS switch to
<OFF>.
• The camera's built-in microphone will also pick up camera operation
noise. If you use a commercially-available external microphone, you can
prevent (or reduce) these noises from being recorded.
• To autofocus again during movie shooting, press the
<AF-ON>
button.
(AF will not work by pressing the shutter button halfway.) However,
autofocusing during movie shooting is not recommended since it can
momentarily throw the focus way off or change the exposure,
• If the card's remaining capacity is not enough for movie shooting, the
movie shooting remaining time (p.148) wili be displayed in red.
• If you use a card having a slow writing speed, a five-level
indicator might appear on the right of the screen during movie
shooting. It Indicates how much data has not yet been written
to the card (remaining capacity of the internal buffer memory).
The slower the card, the faster the indicator will climb upward
If the Indicator becomes full, movie shooting will stop
automatically.
if the card has a fast writing speed, the indicator will either not
appear or the level (if displayed) will hardly go upward. First,
shoot a few test movies to see if the card can write fast enough
• During movie shooting, certain Custom Function settings will be disabled
(p.205-207)
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