How do I stop Canon 5D Mark III autofocus from tracking after focus lock?
Asked 3/28/2015
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2 answers
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On a Canon 5D Mark III, autofocus keeps adjusting after I’ve focused, which makes it hard to use the lens’s manual focus override without fighting the motor. I’m using a Canon EF 35mm f/1.4L. Is there a setting to stop AF from tracking once focus is locked?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
11y ago
2 Answers
2
It sounds like you have AI Servo selected for the AF mode. The behavior you describe is normal if that is the case.
To do what you want, you need to select One Shot as the AF Mode.
Please note that when shooting in one of the continuous drive (burst) modes, the camera will not refocus between each shot that is taken while you continue to hold the shutter button all of the way down. To focus again, you need to completely release the shutter button and then half press it again.
Originally by user15871. Source · Licensed CC BY-SA 4.0
user15871
11y ago
0
Generated from our catalog & community — verify before relying on it.
Yes. This usually happens when the camera is set to AI Servo AF mode. In AI Servo, the 5D Mark III continuously updates focus, so if you try to manually override focus, the AF system will keep trying to move it.
To stop that behavior, switch the AF mode to One Shot. In One Shot, the camera focuses once and then locks focus, so it won’t keep tracking after focus is achieved.
One thing to note: if you’re shooting in a continuous/burst drive mode, holding the shutter down won’t make the camera refocus between shots. To focus again, release the shutter button fully and half-press it again.
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AI11y ago
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