Thephoblographer discovered something that nobody has reported so far: only 6 Sony lenses (SAL2470Z, SAL2875, SAL50F14, SAL300F28GII, SAL70400G and SAL50050F4G) will be compatible with the new 102 AF points on the Sony a99:
The news is/or at least my impression at the time of launch was that the 102 AF points would work alongside the 19 point AF to ensure a more precise focus. The truth is that the 102 AF points will only work in the new AF-D mode of the camera which can sense depth and continuously track objects very accurately. The big news to me and the staff was that the camera only currently supports 6 lenses at this point of time.
The specifications on Sony's website confirm this statement:
New AF-D Mode
This highly advanced Continuous AF mode uses 19 AF points with reliable depth-direction focusing performance to steadfastly capture subjects and is strongly assisted by the 102-point multi-point focal-plane phase-detection AF sensor. It continues to accurately focus on the subject whether the subject is moving in depth or plane direction4.
In the footnotes it says:
4. Note that at the time of launch the following lenses support AF-D: SAL2470Z, SAL2875, SAL50F14, SAL300F28GII, SAL70400G, SAL50050F4G.