AI Servo (Autofocus Continuous) is a powerful feature in the Canon EOS 5D Mark III that allows photographers to maintain sharp focus on moving subjects. Whether capturing fast-moving sports action, wildlife in motion, or a lively event, AI Servo ensures that your subject remains in focus, even as they move across the frame.
To make the most of AI Servo on the 5D Mark III, follow these steps:
1. Select AI Servo Mode: On the top of the camera, switch the AF mode to AI Servo. This tells the camera to continuously track moving subjects and adjust focus accordingly.
2. Choose the Appropriate AF Area: Use the joystick or the multi-controller on the back of the camera to select the appropriate AF area. For subjects moving in a straight line, a single-point or expanding point AF area may be suitable. For erratic motion, consider using the Zone AF or Automatic Selection AF point options.
3. Set Your Custom Function: The 5D Mark III offers a variety of custom function settings for AI Servo. Custom Function III-6 (Tracking Sensitivity) allows you to adjust how quickly the autofocus system responds to changes in the subject’s distance. Custom Function III-5 (AF Assist Beam Firing) allows you to enable or disable the AF assist beam that aids in focusing in low light conditions.
4. Maintain Proper Technique: Even with AI Servo engaged, it’s important to use proper shooting technique to optimize focus. Keep the subject within the selected AF area, maintain a steady hand, and anticipate the subject’s movements to ensure the best results.
5. Monitor and Adjust: While shooting in AI Servo mode, keep an eye on the viewfinder or the rear LCD screen to ensure that the camera is tracking the subject as desired. If you notice the focus is lagging behind the subject, consider adjusting the custom function settings or using a different AF area mode.
6. Practice and Experiment: Familiarize yourself with the behavior of AI Servo by practicing with different types of moving subjects in various shooting conditions. Experiment with the custom function settings to find the optimal configuration for your specific shooting needs.
By mastering the use of AI Servo on the Canon EOS 5D Mark III, photographers can confidently capture sharp, dynamic images of moving subjects. Whether shooting sports, wildlife, or events, the AI Servo mode, combined with the camera’s advanced autofocus system, provides the tools for achieving outstanding results in dynamic shooting situations.
