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IV. DISCUSSION OF NEW AND IMPROVED FEATURES 13
Image Recording and
Processing
With the EF 24mm f/2.8 or EF 28mm f/2.8 lens, cross-type focusing will
be active with the 13 AF points shown in the diagram; the remaining
6 AF points will be horizontal line-sensitive at f/5.6.
All other EF lenses take full advantage of the AF sensor.
All basic specifications related to image
processing such as Dual “DIGIC III”
Image Processors, 14-bit A/D conver-
sion, and DDR SDRAM are the same as
those of the EOS-1D Mark III.
The number of pixels for all image sizes is about double that of the EOS-1D Mark III. The
recorded resolution can be set to any one of six sizes. For JPEGs, the compression rate
can be set to one of 10 settings for each image size, a feature shared with the EOS-1D
Mark III. The sRAW or Small RAW setting that was originally introduced with the EOS-1D
Mark III becomes even more useful with the EOS-1Ds Mark III, since the resolution in
sRAW is 5.3 megapixels with the new camera.
21.1M
CMOS
14-bit A/D
conversion
Front-end
processing
circuit
Dual
"DIGIC III"
DDR
SDRAM
CF card
SD card
DIGIC III
Memory (DDR SDRAM)
Image-processing Sequence Diagram
Digital Control Circuit Board
* The number of possible shots (battery life) and continuous shooting speed are based on Canon's testing standards and a 2 GB CF card.
* Under Maximum burst, the number in parentheses is the maximum burst with a UDMA-compatible 2 GB CF card used in Canon's tests.
* JPEG quality 8, ISO 100, the Standard Picture Style and initial Custom Function settings.
* The actual file size of one image, number of possible shots (battery life), and maximum burst during continuous shooting vary depending
on the subject, memory card brand, ISO speed, Picture Style, Custom Function settings, etc.
Image size
File Size
[Approx. MB/
Shot]
Possible Shots
[Approx.]
Maximum burst
[Approx.]
Printing
Size
High-speed Low-speed
L 6.4 A2 or larger
M1 5.2 Around A2
M2 3.9 Around A3
S 2.2 Around A4
RAW 25.0 A2 or larger
RAW+
L 25.0 + 6.4
–
M1 25.0 +5.2
M2 25.0 +3.9
S 25.0 + 2.2
sRAW 14.5 Around A4
sRAW+
L
Pixels
[Approx. megapixels]
21.10 (5616 x 3744)
16.60 (4992 x 3328)
11.00 (4080 x 2720)
5.20 (2784 x 1856)
21.10 (5616 x 3744)
–
5.20 (2784 x 1856)
–
14.5 + 6.4
–
M1 14.5 +5.2
M2 14.5 + 3.9
S 14.5 + 2.2
290
350
470
840
75
54
57
60
64
130
82
90
97
100
56 (63)
73 (96)
110 (160)
160 (470)
12 (12)
10 (10)
10 (10)
12 (12)
12 (12)
18 (18)
12 (12)
12 (12)
12 (12)
18 (20)
83 (180)
140 (370)
300 (500)
890 (890)
14 (16)
10 (10)
10 (10)
12 (12)
12 (12)
24 (28)
14 (16)
14 (16)
18 (18)
20 (24)
Recording Quality Specifications