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New 21.1 Megapixel, Full

Frame CMOS Sensor

IV. DISCUSSION OF NEW AND

IMPROVED FEATURES

The 35mm full-frame CMOS sensor of the EOS-1Ds Mark III has been developed and

manufactured by Canon. Its 6.4µm pixels take advantage of a host of Canon R&D

advances to achieve its speed, resolution and image quality. The following features

make the EOS-1Ds Mark III the highest performing digital AF SLR camera:

• 35mm full-frame digital AF SLR with the world's

highest resolution, approximately 21.1

megapixels*

• Wide ISO speed range (ISO 100- 1600, L: 50,

H: 3200)

• Low noise (same level as EOS-1Ds Mark II)

• High-speed signal reading (approximately 5 fps)

• Low power consumption

• Live View Function

*For 24x36mm format as of August 20, 2007.

Although the pixel size is about the same as that of the EOS 30D, the ISO speed range is

the same as that of the EOS-1Ds Mark II.

Pixel size [µm square]

EOS-1Ds Mark III

6.4

EOS-1Ds Mark II

7.2

EOS 5D

8.2

By optimizing the gap between the on-chip microlenses, reducing the height from the

photodiode to the microlens, and improving the fill factor (photo diode area divided by

pixel size) by applying the micro-rule that improves the performance of the exposure

device, light-gathering efficiency has been improved.

Opening Ratio (Conceptual Diagram)

Photo diode area

Pixel Size

EOS-1Ds Mark III

EOS-1Ds Mark II

(6.4 x 6.4 µm)

(7.2 x 7.2 µm)

IV. DISCUSSION OF NEW AND IMPROVED FEATURES

ISO speed range

100 - 1600

Microlens Comparison (Conceptual Diagram)

Pixel Size

EOS-1Ds Mark III (6.4 x 6.4 µm)

36mm

CMOS Sensor (Actual Size)

3200

Gap between microlenses

Photo diode area

Pixel pitch

Photo diode

EOS-1Ds Mark II (7.2 x 7.2 µm)