Shutter Design Specifications - Canon EOS 5D Service Manual

２）Exposure control
Besides the P, Tv, Av, M, and B modes found in EOS-1D-series cameras, the Full Auto
mode is also provided for quick and easy snapshooting.
３）Shutter
A high-speed, highly durable shutter unit for the
35mm full-size sensor has been newly developed (Fig.
025).
⑴High-speed 1/8000 sec.
With the high-torque, shutter-cocking mechanism
and slit-type shutter curtains made of lightweight
and strong ultra-duralumin material, a high shutter
speed of 1/8000 sec. (X-sync 1/200 sec.) is attained.
⑵Highly durable with 100,000 shutter cycles
High durability of 100,000 shutter cycles is
achieved with the shutter plate and lever made of
metal, a high-strength cocking gear, and a cocking
motor using carbon brush.
Also, with the electronic X-contact added to the sync contacts, the shutter unit's X-sync
function uses an optically-detected, contactless switch instead of a mechanical switch.
This contributes to high durability and high reliability when a Speedlite is used. Table
005 shows the shutter design specifications.
Item
1. Type
2. Shutter curtain type
3. Shutter curtain blades
4. Shutter curtain material
5. Drive system
6. Speed control method
7. Curtain speed
8. Shutter speed range
9. Max. flash sync
10. Signals
Table 005 Shutter Design Specifications
Vertical-travel, focal-plane shutter
Parallelogram link type
1st curtain: 4 blades 2nd curtain: 4 blades, total 8
1st curtain: 3 blades made of KN Mylar, one blade made of Duralimin
2nd curtain: 3 blades made of KN Mylar, one blade made of Duralimin
1st curtain: Dedicated torsion spring
2nd curtain: Dedicated torsion spring
All speeds electronically controlled with the electrical conduction interval of the
1st curtain's dedicated magnet and the 2nd curtain's dedicated magnet. (The
magnet attracts the curtain when turned on, and releases when turned off.)
Approx. 3.77 ms/24 mm
1/8000 sec. - 30 sec., bulb
1/200 sec.
1. X-sync (electronic X), 2. 2nd curtain travel-completed signal
12
Technical Information
Fig. 024 Shutter unit
Specification