Canon 580EX - Speedlite II - Hot-shoe clip-on..., Service Manual, Page: 8 / 97

General Information
Although the 580EX II inherits the 580EX's basic functions, its reliability and features have
been improved to meet the high-end needs of professional photographers.
1) Improved Reliability and Features for Professionals
■EOS-1D Mark III's dust- and water-resistance
While retaining the 580EX's easy operation, the 580EX II attains the same high level of
dust- and water-resistance as the EOS-1D Mark III. Details are explained below.
1. Exterior seams and joints, window edges, moving parts, and the control panel are sealed
against dust and water.
2. Dust- and water-resistant battery compartment cover and external power pack terminal
cover.
The battery compartment cover and external power pack terminal cover are lined with
rubber O-rings for dust- and water-resistance.
3. Dust- and water-resistant adapter for mounting foot.
A dust- and water-resistant adapter for the mounting foot is provided. When attached to
the new hot shoe of the EOS-1D Mark III and newer cameras, a high level of dust- and
water-resistance is attained. Although this adapter can also be fitted on the hot shoe of
older cameras, the dust- and water-resistance will not be so effective.
4. Sliding switch eliminated
Since sliding switches (power switch and wireless selector) make water seepage easier,
they have been eliminated to improve dust- and water-resistance. The power switch is
now shaped for better dust- and water-resistance. The wireless selector now operates
with the ZOOM button and selection dial.
5. Dust- and water-resistant system
The external power pack (CP-E4) and Off-Camera Shoe Cord (OC-E3) to be marketed
together with the 580EX II are also designed for dust- and water-resistance on par with
the EOS-1D Mark III. Thus, the system as a whole is now dust- and water-resistant.
Seals indicated in Brown
Fig. 002 580EX II dust- and water-resistant parts