The dimensions (W x H x D) of the EOS-1Ds Mark III are: 156 x 159.6 x 79.9mm/6.1 x
6.3 x 3.1 in. It is 3mm taller than the EOS-1D Mark III. The body-only weight is approxi-
mately 42.7 oz./ 1,210g, approximately 1.9 oz./55g heavier than the EOS-1D Mark III
but 0.18 oz./5g less than a body-only EOS-1Ds Mark II. The difference in this case
becomes more pronounced when the respective batteries are added in: 48.9 oz./1,385g
for the EOS-1Ds Mark II vs. 54.9 oz./
1,555g for the Mark II, a difference of
approximately 6 oz./170g.
Water- and dust-resistant construction is
the same as the tight and thorough seal-
ing of the EOS-1D Mark III.
Except for the 35mm full-frame CMOS sen-
sor, large glass pentaprism, and full-frame
Self Cleaning Sensor Unit, the internal com-
ponents (including the shutter and the
shutter-release mechanism) are the same
as those of the EOS-1D Mark III.
The basic electronic components are the
same as those of the EOS-1D Mark III.
However, certain boards have been optimized
for the 35mm full-frame CMOS sensor. For
example, due to the larger circuit, the Self
Cleaning Sensor Unit board has been split into two boards.
All parts comply with the RoHS (Restriction of the Use of Certain Hazardous Substances
in Electrical and Electronic Equipment) Directive.
Cross Section at Center
Pentaprism
Condenser lens
Laser Matte
surface
If there is a small noise when the camera is shaken, it is the sound of the ball bearings in
the camera orientation detection unit.
IV. DISCUSSION OF NEW AND IMPROVED FEATURES
Location of Major Water-resistant Measures
Parts Count
Optics
Mechanical parts
Electrical parts
Circuit boards
Lead wires
Total (Official)
Screws and washers
Total
* The shutter unit is counted as 1 part.
* The DC/DC converter is counted as 1 part.
* The E-ring is counted as a washer.
* The official total excludes the screws and washers.
SI lens 2
SI mirror
SI lens 1
Focusing
screen
45 main reflex
mirror
Fully-reflective
mirror
Infrared-absorption
filter
Fixed aperture
Secondary
image-forming lens
T
Item
1Ds Mk III
35
674
1557
41
162
2323
349
2672
SI prism 1
Metering sensor
Metering lens
Eyepiece lens 4
Eyepiece lens 3
Eyepiece lens 1
Eyepiece lens 2
SI prism 2
H-LCD
H-LCD prism
Image sensor
Low-pass filter
LCD monitor
Secondary mirror
AF sensor
Rear LCD panel
Lithium-ion battery
1Ds Mk II
30
628
1479
43
22
2202
311
2513
20
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