Specifications

Highlight tone priority
Picture Style
New default image
settings
When using Manual or Bulb modes, ALO compensation is based on the exposure set by the
photograp
her. Backlit subjects have a tendency to be underexposed. If the photographer tries
to compensate for this by exposing for the subject, the background becomes overexposed.
However, by enabling ALO and exposing for the background, the main subject will be
brightened for a more balanced image with regard to brightness and contrast between
background and main subject. Adjusting exposure can be tricky when photographing a
brightly lit subject set against a large dark background, such as a shaded forest or crowded
stadium; ALO may be affected by the background and overcompensate. In situations such as
these, expose for the main subject and set ALO to “1: Low” or “3: Disable.”
Highlight tone priority has the same specifi-
cations as it did on the EOS-1D Mark III.
The “D+” icon has been added to the LCD
panel and viewfinder to indicate that high-
light tone priority has been set. (Since
“D+” is displayed, the ISO speed’s zero
numeral is not displayed small, as with
the EOS-1D Mark III.) If C.Fn II-3-1 is
set, the ISO speed range will be limited
to ISO 200–12,800.
The basic image characteristics of each Picture Style are the same as before. However, in
response to user feedback, the following Picture Styles have been fine-tuned: Standard,
Landscape, Portrait and Monochrome. To make images usable as is, without any post-processing,
the default sharpness setting is more aggressive than with the EOS-1D Mark III. This makes
image resolution look better when viewed on a personal computer or print. Neutral and
Faithful are unchanged as their emphasis on plain, unaltered image characteristics is geared for
post-processing. In these Picture Styles, the degree of sharpening at default settings is the
same as with the EOS-1D Mark III. If you view an image at 100% magnification or higher,
image detail will look more natural than with the four Picture Styles listed above.
Low-noise technology has allowed the achievement of greater sharpness than in the EOS-1D
Mark III without degrading image quality. The “Standard,” “Landscape,” “Portrait” and
“Monochrome” Picture Styles produce sharper, higher-contrast images (because of ALO)
appropriate for use without adjustment. The “Neutral” and “Faithful” Picture Styles use the
previous model’s default settings to provide a natural-looking image that is ideal as a base for
post-processing. Images are optimally sharpened to prevent them from appearing fuzzier
than 1D Mark III images displayed at the same size (because the EOS-1D Mark IV pixel
count is 1.6 times greater).
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IV–7. IMPROVED JPEG WORKFLOW
Highlight Tone Priority