Specifications

EOS Integrated Cleaning
System
Improved white balance
algorithm and auto white
balance
Related to the workflow issue in the sense that a clean sensor produces files that don’t need
to be spotted, the EOS-1D Mark IV uses the EOS Integr
ated Cleaning System to minimize
dust generation and dust adhesion to the sensor and to shake dust off the sensor or to make
it less noticeable. Although the preconditions for operation of the Self Cleaning Sensor Unit
and the specifications for obtaining and appending the dust delete data are basically the
same as with the EOS-1D Mark III, the EOS-1D Mark IV’s low-pass filter has a new fluorine
coating on the infrared absorption glass. The coating improves resistance to sticky and moist
dust. Dust removal has been improved with a revamped drive sequence.
An improved white balance algorithm now makes color reproduction when shooting under
low color temperature light sources (light sources with a strong red cast such as tungsten and
certain mercury varieties) more precise. The preset WB, custom WB, color temperature setting,
personal WB, WB correction, WB-BKT specifications are all the same as with the EOS-1D
Mark III. Note that with
bright shots, such as sunsets,
the result is almost the same
as with previous cameras.
Also, if you want the strong
color cast to remain, just set
the color temperature setting
manually to around 4000K.
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IV–7. IMPROVED JPEG WORKFLOW
EOS-1D Mark IV EOS-1D Mark III
AWB Comparison
Infrared-absorption glass
Piezoelectric
element
Support material
Sealing material
Low-pass filter
CMOS sensor
Low-pass mask
Cleaning Sensor Unit Construction Diagram