Design And Construction - Canon EOS EOS 5D White Paper

100,000-cycle life this unit enjoys. This is a level of durability expected in a professional
camera. For example, based on Canon's test standards, the EOS-1D Mark II and –
1Ds Mark II cameras are rated at 200,000 shots; the EOS-1v model is rated at 150,000
shots and the EOS-1n camera is rated at 100,000. In another clever bit of reliability
engineering, because the electronic X-contact has been 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, and also can handle trigger circuit voltages up to 250V from non-dedicated flash
units, whether they are connected through the hot shoe or the provided PC socket.

Design and Construction

The EOS 5D Digtial SLR has a solid, substantial
and organic feel that complements its compact
dimensions and reasonable weight. Truly, it is
a premium camera. The top, front and rear
covers and battery grip are made of magnesium
alloy, known for being lightweight and strong.
Also, the USB port, video terminal and other
external interface connectors concealed under EOS-1Ds Mark II
the left cover use special engineering plastic
with excellent electromagnetic shielding
properties.
The EOS 5D camera's basic internal construc-
tion and major parts' configuration are the
same as those of the EOS 20D model. The 5D
camera has an improved grip and mode dial, a
modified terminal cap shape and clearer rear
controls. The pentaprism has an all-new shape
Size comparison
necessitated by the full-frame sensor and all associated components such as the mirror,
mirror box and shutter. Thanks to the design and manufacturing know-how accumulated
with previous EOS Digital cameras, as well as the low-pass filter integrated with the
CMOS cover glass, the EOS 5D model can be both more compact than one might expect
a high performance DSLR with a full-frame sensor to be, and more affordable as well.
The camera body consists of a stainless steel chassis and a mirror box made of high-
strength engineering plastic. The mirror box, to which the mount and imaging element
are attached, is very securely attached to the chassis to prevent the flange focal distance
from changing due to static pressure on the attached lens. Since the grip and front
cover are one piece, body rigidity is excellent.
The exterior surface finish is a high-density black satin finish with a leathery touch that
feels smooth in the hands. The three grip surfaces are covered with rubber. The
electroplated "EOS 5D" badge and recessed and painted Canon logo give a quality
appearance to the camera.
III. PERFORMANCE AND RELIABILITY 10