Fire on Focus Confirm

[Rocco]

Congrats on the lens! It's not my most used, but by far my favorite! (portraits, mostly) When using hand held, try AI Servo if auto focusing. The 7D and 1D mkIV have the "Intelligent Macro Tracking" feature when the body detects a macro lens is attached.

Intelligent Macro Tracking (7D & 1D Mark IV only)

A very useful feature of the EOS 7D and 1D Mark IV cameras is its Intelligent Macro Tracking function. This helps reduce blur during macro shooting by recognizing when a Canon macro lens is attached and automatically adjusting the AI Servo sampling frequency when the lens is focused on a close-up subject. The AI Servo adjustment accounts for camera movement forward and back, a typical occurrence when moving in close for a macro shot as photographers rock back and forth, or a flower blows in the wind.

No special settings or Custom Functions need to be enabled on the EOS 7D and 1D Mark IV to take advantage of this; you only need to have the camera set to AI Servo AF mode, and be focused upon a small object at 1/3 life-size (0.3x magnification) or greater with a Canon Macro lens having an Ultrasonic focusing motor. With all other Canon lenses, or with a macro lens at magnifications less than 0.3x, AI Servo AF reverts to ordinary focus tracking operation.


-Chuck Westfall

http://www.ronmartblog.com/2011/08/understanding-canons-hybrid-is-and.html