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AF shutter-release parameter settings 

[AF2 tab/AF3 tab]

AF operation and Image/Focusing Priority settings

You can set whether focusing or shutter-release has priority

You can decide whether to put priority on focusing or 
shutter-release

You can decide whether to put priority on focusing or 
shutter-release

1st image parameter [AI Servo 1st image priority]

[One-Shot AF release priority]

Parameters during continuous shooting [AI Servo 2nd image priority]

Image/Focusing parameters during AI Servo

[Set in the AF 2 tab]

Image/Focusing parameter for One-Shot AF

[Set in the AF3 tab]

This setting gives an equal priority to both focus 
and shutter-release

Equal priority

You cannot shoot a picture unless it is in focus. It is 
ef fec tive when you want to shoot only af ter 
focusing on the subject.

Focus priority

This setting gives an equal priority to both focus and 
shooting speed during continuous shooting. The 
speed of continuous shooting may also slow down 
when it is dark, or low contrast.

Equal priority

This setting gives priority to shutter-release and will 
capture an image even if it is out of focus. It is 
effective when you want to minimize any delay 
when shooting, sacrificing AF performance

Release priority

Priority is on the shooting timing rather than focus. 
It is recommended only when you want to put 
priority on capturing brief photo opportunities 
rather than focus.

Release priority

This setting gives priority to a continuous shooting 
speed rather than priority on focus. Continuous 
shooting speed will not drop. Effective when you 
want 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 you want to ensure your 
images are in focus sacrificing response speed. 

Focus priority

This setting gives priority to focusing rather than 
continuous shooting speed. It cannot shoot a picture 
unless it is in focus, greatly reducing continuous 
shooting speed. It is recommended when you want 
to shoot only after focusing on the subject.

Focus priority

The [AF2] and [AF3] tabs include settings related 
to AF operation parameters and shutter-release 
timing. With these items it is possible to set 
which has priority (or a balance) between 
focusing with AF, and the shutter-release.
The [AF2] tab contains the [AI Servo 1st image 
priority] and [AI Servo 2nd image priority] 
parameters for AI Servo AF. The priority on 
focus and shutter-release can be set for both 
the 1st image and subsequent images during 
continuous shooting. With [Focus priority], 
shooting is delayed until after the camera has 
focus on a subject (this could be just a few 
milliseconds). With [Release priority/Shooting 
speed priority] shooting takes place instantly 
without waiting to focus, resulting in possible 

out of focus images. The default [Balance 
priority] sets equal priority on both (attempting 
to focus without major delays to shutter release 
timings), ideal for most shooting situations. 
When using One Shot AF the shooting priority 
can also be altered via the [One-Shot AF release 
priority] option in the [AF3] tab. The priority of 
focusing and shutter-release can be altered in 
the same way as about during AI servo AF. 
However there is no [Balance priority], and 
instead [Focus priority] is the default setting.

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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