Sony ILCA-99M2 - Manual (Page 274)

The number of focus points used for focusing are set automatically depending on the lens or
shooting mode. Uses all 399 focus points at maximum.
Only Cross-Type AF:
Limits available 79 focus points at a maximum in the cross-type AF area.
The number of focus points depending on the lens
The number of focus points will be limited when the following lenses are attached.
Lens: SAL75300, SAL1118, SAL55200, SAL1855, SAL18552, SAL55200-2, SAL30M28,
SAL55300
The number of focus points: 61 points
Lens: SAL500F80
The number of focus points: One single point at the center
[Only Cross-Type AF] cannot be set.
This information is current as of the day the model was released. Some of the lenses above
are not available in some countries or regions.
Hint
We recommend that you set the camera to [Only Cross-Type AF] in the following situations:
When you want to prevent the number of focus points from changing automatically depending on
the lens you attach
When focusing is difficult at the surrounding points
When you want to select a focus area quickly by limiting the available focus points
Note
If you attach a lens that does not support Hybrid Phase Detection AF, or [AF System] is set to [Ddc
Phase AF Only], a focus area that does not perform cross-type detection will also be used even
when [Selectable AF Area] is set to [Only Cross-Type AF].
When the shooting mode is set to (Movie/S&Q Motion), [AF System] is locked to [Ddc Phase AF
Only]. The number of focus points is limited to 61.
[286] List of MENU items Camera Settings1
AF System
Sets whether to use the Hybrid Phase Detection AF system, which uses both the focal plane
phase detection AF sensor and the dedicated phase detection AF sensor, or use only the
dedicated phase detection AF sensor to perform auto focus.
MENU
→
(Camera Settings1)
→ [AF System] → desired setting.
1