Sony ILCA-99M2 - Manual (Page 64)

Subjects seen through glass
Fast-moving subjects
Reflective light or shiny surfaces
Flashing light
Back-lit subjects
Continuously repetitive patterns, such as the facades of buildings
Subjects in the focusing area with different focal distances
Note
Only [Continuous AF] and [Manual Focus] are available in the movie shooting mode.
Hint
In [Continuous AF] mode, you can lock the focus by pressing and holding the button that has been
assigned the [Focus Hold] function.
[32] Shooting Auto focus
Auto focus mechanism
This camera is equipped with a Hybrid Phase Detection AF system simultaneously driven by a
focal plane phase detection AF sensor and a dedicated phase detection AF sensor. Use lenses
that support the Hybrid Phase Detection AF system for a wide area, high density, multiple
points, and Hybrid Cross AF Points*
1
, which are difficult to achieve with just a single dedicated
phase detection AF sensor.
Auto focus area in Hybrid Phase Detection AF
The Hybrid Phase Detection AF system is active when a lens that supports the Hybrid Phase
Detection AF system is attached and [AF System] is set to [Auto]. The Hybrid Phase Detection
AF system allows you to use an auto focus function with a wide area, 399 focus points
(maximum), and Hybrid Cross AF. 323 focus points are selectable.
Conceptual diagram
When a lens that supports Hybrid Phase Detection AF and full-frame size is attached
In Hybrid Cross AF points, the focal plane phase detection AF sensor and dedicated phase detection AF sensor
work together. These points have a superior capturing ability and can achieve high-accuracy focusing. *1