I've been challenged with the following scenario: I'm shooting a stationary bird with a Sony A77M2 and 300mm lens. Eventually the bird takes flight. How should I configure and use the body's autofocus features to maximize my odds of getting sharp photos of the bird in flight?
The number of autofocus options and functions are overwhelming. (And I don't have enough opportunities to do good A/B tests of this scenario.)
Among the autofocus options in the menus:
- Focus Area
- AF-A vs DMF
- AF drive speed
- AF Track Duration
- Center Lock-on AF
Then there's focus limiting ("AF range control").
And there are additional features that depend on the Focus Area setting.
And, I think, the camera has some capacity to identify the subject (e.g., the bird) and AF-track it as it moves.