Canon 1Ds Image Recording and Processing

IV. DISCUSSION OFNEW AND IMPROVED FEATURES 13
Image Recording and
Processing
With the EF24mm f/2.8 or EF 28mm f/2.8 lens, cross-type focusing will
be active with the 13 AFpoints shown in the diagram; the remaining
6AFpoints will be horizontal line-sensitive at f/5.6.
Allother EF lenses take full advantage of the AF sensor.
Allbasic specifications related to image
processing such asDual “DIGIC III”
Image Processors, 14-bitA/D conver-
sion, and DDR SDRAM are the same as
those ofthe EOS-1D Mark III.
The number ofpixels for all image sizes is about double that of the EOS-1D MarkIII. The
recorded resolution can be setto any one of six sizes. For JPEGs, the compression rate
can be setto one of 10 settings for each image size, a feature shared with the EOS-1D
MarkIII. The sRAW or Small RAW setting that was originally introduced with the EOS-1D
MarkIII becomes even more useful with the EOS-1Ds Mark III, since the resolution in
sRAWis 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 (DDRSDRAM)
Image-processing Sequence Diagram
DigitalControl 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 shootingvary depending
on the subject, memorycard 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
S2.2 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)
RecordingQualitySpecifications