Specifications

Autofocus Point Selection Method
With the 19-points that can be selected to perform autofocusing,
there are ve methods that can be chosen to make use of the AF
points:
1 - Manual Selection: Single Point AF – any of the 19 AF points can
be selected giving you exibility in framing your subjects when using
the creative shooting modes of P, Tv, Av, M and Bulb.
2 - Manual selection: Spot AF – this mode is useful in situations
where you want to be very precise about the area you focus on –
when shooting small macro subjects or when taking portraits.
3 - Manual selection: AF point expansion – focus is achieved with the
selected AF point with assistance provided by the surrounding AF
points. This is especially useful when tracking fast moving subjects
and was a custom function on previous EOS cameras.
4 - Manual selection: Zone AF – the user is able to select one of ve
zones (left, top, centre, bottom and right) to use at any one time.
The camera will automatically select a point from within the selected
zone to track the subject. This makes it easier to track moving
subjects such as birds in ight.
5 - Auto Selection: 19 point AF – on all previous EOS models, the
centre point was always used as the primary AF point to rst achieve
focus. By being able to select the AF point to start tracking with you
have a much greater exibility in how you compose your images.
AI Servo II AF
The AI Servo II AF mode that tracks moving subjects has been
signicantly improved in the EOS 7D. The system is predictive and
continually calculates the next position of the subject being tracked.
It will now ignore a reading if it is signicantly different to what it
expected to help to stop the lens jumping completely out of focus.
The system can also keep track of a moving subject even if an
obstacle is detected between the camera and the subject, such as
when shooting sports. Should you drift away from the subject, the
focus will now not snap to the background immediately so when
you put the AF point back on the subject the EOS 7D camera re-nds
focus much more quickly.
The system on the EOS 7D needs no ‘warm-up’ time and can track
a subject immediately and more accurately. In short it’s a fast,
accurate and stable tracking AF system that will get you the shot no
matter what the situation. It can even be used when shooting macro
subjects – something that was not possible before.
TOP LEFT: The EOS 7D’s autofocus
system can track subjects at up
to 8fps. EOS 7D + EF 300mm
f/2.8L IS USM; 1/5000sec, f/2.8,
ISO 200.
BOTTOM LEFT: The AF Sensor
from the EOS 7D.
Focusing area of one AF point
(70mm or shorter focal distance)
Single spot AF focusing area
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