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As introduced on P 36, the EOS-1D Mark IV
has an extremely wide range of normal ISO
levels from ISO100 - 12800. By using this wide
range of normal ISO speeds and ISO Auto, it is
possible to shoot continuously with the same
aperture value and shutter speed going from
bright locations to dark locations. By simply
selecting "A" in the ISO speed settings, the ISO
Auto setting will be activated.
Next, the exposure mode is set to Manual, the
desired aperture value and shutter speed are
set, and then shooting is carried out. Shooting
begins in a bright location, and as the camera is
directed toward a darker location, shooting
takes place with the ISO speed increasing
automatically. This method is effective when
you want to continuously shoot with a certain
aperture value and shutter speed setting.
Shooting takes place with the same
aperture value and shutter value and only
the ISO speed will change
It was possible to photograph the athlete
continuously from a bright location to a dark
location with no changes to the aperture at
f/2.8 and shutter speed at 1/1000 sec.
Aperture f/2.8 1/1000 sec. (ISO400)
Aperture f/2.8 1/1000 sec. (ISO320)
EF70-200mm f/2.8L IS USM 1/1000 sec. f/2.8 ISO Auto