@Local_Hero wrote:
When using back button focusing when does the IS engage? Is it when you are pressing the focus button or when you press the shutter?
Just wondering because sometimes I lock in my focus with the back button then wait a couple seconds to hit the shutter button (depends on the scene I'm working with). This has just been something I was wondering. I'd test it out but I don't currently have a lens with IS.
Not sure if it varies by camera/body, but for the 5DM3 and 7D, IS starts for both when you press the focus button and the shutter. It stays on for a few seconds after you let go of either button.
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