Canon EOS-1D C - Manual (Page 230)

230
k Shooting Movies
ISO speed during manual-exposure shooting
With [Auto] (A), the ISO speed will be set automatically within
ISO 100 - 25600.
You can set the ISO speed manually within ISO 100 - 25600 in 1/3-
stop increments. Under [z2: ISO speed settings], if [ISO speed
range]’s [Maximum] is set to [51200/H], the manual ISO speed
setting range’s maximum will be expanded to H (equivalent to ISO
51200). Note that even if you set [Maximum] to [51200], the
maximum will remain at ISO 25600 and not be expanded. Setting
[Maximum] to [H1 (102400)] or [H2 (204800)] will enable the setting
range to be expanded up to ISO 102400/204800.
If [z2: Highlight tone priority] is set to [Enable] (p.154), you can
set the ISO speed within ISO 200 - 25600 (depending on the [ISO
speed range] setting).
Under [z2: ISO speed settings], [Auto ISO range] and [Min.
shutter spd.] cannot be set (p.131, 132) for movie shooting.
Since shooting a movie at ISO 32000/40000/51200 may result in
substantial noise, these speeds are designated as expanded ISO
speeds (displayed as [H]).
If [ISO speed range]’s [Minimum] is set to [L (50)] and you switch from
still photo shooting to movie shooting, the manual ISO speed setting
range’s minimum for movie shooting will be ISO 100. It cannot be
expanded to ISO 50.
Changing the shutter speed or aperture, or zooming the lens during
movie shooting is not recommended since the changes in the exposure,
or noise at high ISO speeds may be recorded.
When shooting a movie of a moving subject, a shutter speed of 1/30 sec.
to 1/125 sec. is recommended. The faster the shutter speed, the less
smooth the subject’s movement will look.
If you change the shutter speed while shooting under fluorescent or LED
lighting, image flicker may be recorded.
If ISO Auto is set, you can press the <A> button to lock the ISO speed.
When you press the <A> button and then recompose the picture, you
can see the exposure level difference on the exposure level indicator
(p.25, 231) compared to when you first press the <A> button.
By pressing the <B> button, you can display the histogram.
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