7D focus issue help

Started Mar 12, 2012 | Discussions thread
elfroggio
MOD elfroggio Veteran Member • Posts: 3,115
Clarifications about the 7D focus

Just a few of clarifications:

  1. One shot: The subject is static. The AF assumes that the subject is static. The focus is achieved immediately and that's it, you can remove your finger from the back button, it won't keep on focusing.

  2. One shot: The subject is moving. The AF assumes that the subject is static. The photo will be out of focus.

  3. AI Servo: The subject is static: The AF assumes that the subject is moving. The focus will immediately starts tracking the movements. Oops, the subject is static, so now the AF realizes and achieves focus, which is why often the 1st photo is out of focus and the next one in the serie is in focus. Canon is telling you that you are in the wrong mode.

  4. AI Servo: The subject is moving. The AF assumes that the subject is moving. The focus will immediately starts tracking the movements.

  5. AI Focus: The subject is static. The AF assumes that the subject is static. The focus is achieved immediately and that's it.

  6. AI Focus: The subject is moving. The AF assumes that the subject is static. The focus is not achieved. The AF switches to Servo. Which is why often the 1st photo is out of focus and the next one in the serie is in focus. Canon is telling you that you are in the wrong mode.

The difference between the One Shot and the AI Focus. The AF assumes that the subject is static but with the AI Focus the AF will switch to Servo if needed.

Source: Rudy Winston of Canon

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tko
tko
MOD elfroggio
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