Originally posted by JinDesu You aim at the bird, lock focus, and if the bird moves around, the camera will continue to focus on it - until the bird leaves the pink points. But as long as the bird moves into any of the pink points, the AF works.
I promise I'm not trying to be intentionally obtuse or dense here, and I appreciate your patience with me: So if I click the shutter while the bird is in the frame but is
between two of those pink points, it won't be in focus? In other words, does the bird actually have to be precisely on one of the pink points (or vice versa) for this type of focusing to work? Or is there no such thing as "between" the pink points? By that, I mean are they all contiguous? It's actually hard for me to tell as I watch the video (probably because I've never used any DSLR before; everything I've learned for the past year and a half as been by doing research on the internet).
Originally posted by JinDesu I assume the camera figures out what object it is focused on and tracks it up to one AF point away. For the camera to figure out if it moves more than one AF point away, it might need a lot of processing power (guessing here).
So that's probably why there isn't a "One click set's all" solution.
Your answer confirms that my phraseology and lack of understanding was confusing you. When you answered with, "...as long as the bird moves into any of the pink points, the AF works," it tells me that they are all functioning at the same time. In essence, that's what I meant by "one-click-sets-all."
However, this leads me back my initial point of confusion: Why, then, is there a menu that lets you "move around" between the different areas of the frame separately (right, left, top, bottom, corners) -- as FruitLooPs is showing us in the video? What's the point of being able to move around from one to the other individually if they all function at the same time? That's what misled me to believe you could only set one "pink" area at a time.