Canon EOS 5D Mark II - EOS 5D Mark II 21.1MP Full Frame CMOS Digital SLR Camera, Service Manual

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General Information
8
３）Shooting functions
⑴Viewfinder
The viewfinder provides 96% coverage, 0.710
magnification, 20mm eyepoint, and -3 to +1 dpt
dioptric adjustment.
The Precision Matte focusing screen is
interchangeable. Besides the standard Ee-A screen
(characteristics are almost the same as the EOS
20D's focusing screen), the Ee-D with grid (Fig.
004) and Ee-S screen for easier manual focusing are
available and sold separately.
Since each focusing screen has different metering
characteristics, you must set C.Fn-00-0/1/2 to
match the respective focusing screen.
The viewfinder information is shown at the
bottom of Fig. 004. Other than the addition of
the FE lock icon, it is the same as the EOS 20D's
viewfinder information.
⑵9 AF Assist 6 points and new AF sensor
The 9-point AF sensor (Fig. 005) is newly
developed. The AF points have the characteristics
below. The AF speed and predictive AF
performance are the same as the EOS 20D's.
・ Center AF point: With f/2.8 lenses, the center
AF point works as a high-precision, cross-type
AF point. (Vertical line is detected at f/2.8 and
both vertical and horizontal lines are detected
at f/5.6.) The f/5.6 horizontal line-sensitive
AF point can now better detect major
defocus conditions to enable focusing while
the lens is way out of focus.
・ AF points directly above and below center
AF point: Vertical line-sensitive at f/5.6.
・ Remaining 6 AF points: Horizontal line-
sensitive at f/5.6.
<Assist AF points>
Within the spot metering circle, there are
invisible Assist AF points ( □■ in Fig. 006) to
help improve the focus tracking performance
in the AI SERVO AF mode. In the AI SERVO AF
mode, they function as described below. (They
do not function in the One-Shot AF mode.)
1. During automatic AF point selection, they
work as supplementary AF points. It is like
having 15 AF points in AI SERVO AF mode.
They are selected automatically.
Fig. 005 AF sensor
：Invisible AF point
for AI SERVO AF
：Vertical line‑sensitive,
invisible AF point at f/2.8
：FE lock mark
Fig. 004 Grid-type focusing screen
and viewfinder information
Fig. 006 AF points and invisible
AF points