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- Dec 16, 2003
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- #16
The way I use BBF, is so that I can use AI Servo, but also lock the focus when I want to focus and recompose (like it was in One Shot).
The problem with using shutter-button-focus and AI Servo, is that you can't focus and recompose...the camera will always focus when you press the button to take the photo. By taking focus away from the shutter button (putting in on the back button) you can independently turn the focus on or off (turning it off is essentially locking it).
So sometimes, I'll be holding down the back button, which would be just like shutter-button-focus in AI Servo mode. But rather than switch to One Shot focus mode, I just release the back button when I want to lock the focus.
The problem with using shutter-button-focus and AI Servo, is that you can't focus and recompose...the camera will always focus when you press the button to take the photo. By taking focus away from the shutter button (putting in on the back button) you can independently turn the focus on or off (turning it off is essentially locking it).
So sometimes, I'll be holding down the back button, which would be just like shutter-button-focus in AI Servo mode. But rather than switch to One Shot focus mode, I just release the back button when I want to lock the focus.
