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On a Canon 50D or 5D I wish to trigger the shutter automatically when the camera senses something has come into focus. Specifically:
- Put the lens in manual focus.
- Use manual focus to focus to a depth with nothing currently in it.
- Now hold the button halfway and wait.
- When something moves into focus field you get a beep and a red outline on the focus box.
I want to take a picture triggered on that event.
I could use a triggertrap with the audio sensor, and once triggertraps are available again I will get one and try this. There must be other ways to do this also, and I would be interested in other solutions.