Specifications

have a highly durable and grippy baked-on black paint finish. The camera body is thereby
strong, rigid, lightweight and of very high quality both in fact and as a subjective matter
of perception.
The EOS-1D Mark IV has the same dust and water resistance level as the EOS-1D Mark III.
A total of 76 locations at camera controls and external cover seams have been outfitted for dust
and water resistance. When the camera is combined with a water-resistant EF lens and EX-series
Speedlite, the entire system will be water resistant.
The configuration of the internal construction and major components is basically the same as
that of the EOS-1D Mark III. The shutter unit has a durability of 300,000 cycles. The mechanical
parts, electronics, optics, operation controls and so forth also have 300,000 cycle durability.
The same shutter-release mechanism as that of the
EOS-1D Mark III is employed. The shutter-release
stroke and pressing force are also the same. The shutter-
release time lag from SW-1 ON is 55 ms (aperture
stopped down by no more than 3 stops). The viewfinder
80
IV–21. DESIGN AND CONSTRUCTION
Countermeasures for Dust- and Water-Resistance
StateStroke Pressure
Shutter button protrusion 1.5mm–
Standby position to SW-1 ON 0.6mm 85g
SW-1 ON to SW-2 ON 0.3mm 350g
Leeway after SW-2 ON 0.2mm–
Shutter-Release Stroke and Pressure
*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.
Item
EOS-1D Mark IV EOS-1D Mark III
7272
Mechanical parts
Optics
Electrical parts
Circuit boards
Lead wires
Total (Official)
Screws and washers
Total
720
1751
47
25
2570
366
2936 2572
325
2247
22
42
1481
675
Parts Count