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AF area selection mode Auto selection of 61 AF points

AI Servo AF with all 61 points used for automatic tracking

Ideal for moving subjects that the old AF systems struggle with

Shooting started by pinpointing focus on the 
leader of a cycling road race with a manually 
selected AF point. While taking continuous 
shots, the camera was moved to the left so the 
following cyclists on the left of the leader are 
r e n d e r e d  b e a u t i f u l l y  o u t  o f  fo c u s  i n  t h e 
background.

When using [One-Shot AF], a single AF point is selected automatically from the 
61 points. When using [AI Servo AF], AF starts from the manually selected AF 
point and then selects the most appropriate from all 61 points.

One-Shot AF

AI Servo AF

Capture the subject with an AF point near 
the center, and then by moving the camera 
to the left, you can compose a photo with 
space on the left side of the frame.

Hints and tips

With “AI Servo AF” mode, the shooting starts 
from one AF frame that is optionally selected.
So select one of any frames covering the 
position where object capturing starts. In 
addition, it will be easy to continue tracking 
thence very convenient, if the same start 
position is selected for Single Point AF and 
t h e n A F a r e a i s s w i t c h e d t o 61 P o i n t 
Automatic Selection AF. 

When using [Auto selection of 61 AF points] 
during [AI Servo AF], focusing will start from 
the manually selected AF point, the camera will 
the automatically change the AF point selecting 
from all 61 points as the subject moves. The AF 
points are arranged in a wide area so it is useful 
for capturing and tracking of subjects, however, 

depending on the shooting conditions or if the 
subject is small, tracking may not be possible so 
caution is necessary. [Auto selection of 61 AF 
points] is effective when shooting subjects with 
movements that cannot be captured with [AF 
point expansion] or [Zone AF] (figure skating 
jump scenes for example).

Another effective use is when you want to take 
action images for publication/articles with lots 
of space in the composition for text etc. In the 
examples above shooting began by capturing 
the targeted cyclist first with a manually 
selected AF point (in the center etc.). From 
there, while continuous shooting and moving 

the camera (lens) to the left or right, it is 
possible to position the lead cyclist off to one 
side and include a lot of background (focusing 
continues to track the cyclist by automatically 
switching AF points). 

All focus points are superimposed on image because of explanation purpose only.

Summary of Contents for EOS 5D Mark III

Page 1: ...AF Setting Guidebook Detailed explanations of how to use the various high precision AF features...

Page 2: ...ement of cross type points used by the F 5 6 lenses Setting the AF Shutter release Characteristics 40 AF operation and shutter release timing settings Utilizing the AF 42 AF points can be set to switc...

Page 3: ...rvo Settings related to the camera priorities when using AI Servo AF The AF 2 tab includes settings related to cameras priority concerning shutter release timing when using AI Servo AF AI Servo 1st im...

Page 4: ...ets to match the characteristics of the type of subject and its movement and the shooting conditions can be selected from Case 1 Case 6 By simply selecting one of these cases settings for the AI Servo...

Page 5: ...ent sudden changes in speed and interruptions by obstacles AI Servo AF III overcomes these and is able to capture the subject Case 1 is the recommend setting to start shooting with Case 1 will provide...

Page 6: ...side to side movement The subject will be tracked even when they move away from the AF points Case 2 is an effective setting for shooting fast moving subjects when they move away from the selected AF...

Page 7: ...ons this setting can be extremely effective is when switching between different subjects you want to shoot for example at the start of a bicycle road race when you want to shoot continuously and switc...

Page 8: ...ons and it can be difficult for the AF system to judge accurately In these situations Case 4 is most effective With the Accelerate decelerate Tracking parameter set to 1 the AI Servo AF will work to f...

Page 9: ...atically switches to other AF points that contain the subject As a result even when the subject continuously leaves the selected AF point it is possible to increase the ratio of photos that are in foc...

Page 10: ...Therefore Case 6 is an effective setting for subjects that stop and start suddenly but also have erratic movement which could happen in any direction it works during Auto selection 61 point AF Zone AF...

Page 11: ...he Responsive 1 2 setting determines that subjects that come into the AF point are new subjects to be focused and quickly focuses It is also effective when you want to quickly focus on subjects that a...

Page 12: ...us accuracy Other parameters are the same so first try shooting with default settings then increase the setting to 1 and then 2 settings when more effective settings are desired Examples where the 0 s...

Page 13: ...subject Use the setting when you want the camera to automatically decide switch to use a new AF point and the 0 setting is used when you want to place emphasis on manually selected AF points to track...

Page 14: ...he camera selects and focuses auto matically Zone AF 61 point automatic selection AF Using only one AF point Press the S button How to set the AF area selection mode Using multiple AF points zone The...

Page 15: ...spot AF mode can be used to focus on a small area of the subject This option makes it possible to focus on the exact area even when there is an obstacle near the area you want to focus on A common ex...

Page 16: ...shooting subjects which might be difficult to determine movement select surrounding mode and when you want to focus on the area the covered by central manually selected AF point best to select the Up...

Page 17: ...ne focusing zones can be selected and the AF point is automatically selected from within that zone Zone AF differs from AF point expansion with it s manually selected AF point which AF tracking is bas...

Page 18: ...t position is selected for Single Point AF and then A F area is s witched to 61 Point Automatic Selection AF When using Auto selection of 61 AF points during AI Servo AF focusing will start from the m...

Page 19: ...II USM The colored AF points are for illustrative purpose only This does not represent the actual viewfinder display Up to 41 point cross type AF with f 4 lenses enabling superior tracking performance...

Page 20: ...ke use of the central 21 point cross type AF EF70 200mm f 4L IS USM EF100 400mm f 4 5 5 6L IS USM EF 17 40mm f 4 L USM EF70 300mm f 4 5 6L IS USM In Group C 41 point cross type AF points can be used w...

Page 21: ...t to shoot with a fixed interval between photos Shooting speed priority This setting gives priority to focusing on a subject and it cannot capture an image unless it is in focus It is recommended when...

Page 22: ...s shot was taken with the orientation option set so that when in the horizontal position the central AF point was set but when the grip is at the top in a vertical position the AF point is at the bott...

Page 23: ...ntal as well as the remembered AF point for orientation S h o o t i n g t h e s i d e to s i d e movement of tennis strokes After photographing the player positioned to the right side with a manually...

Page 24: ...n as they approach You can leave AF point selection up to the camera and concentrate on framing as you shoot From AF point expansion to 61 point automatic selection AF Buttons that can be assigned to...

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