Hello Frank, today I and some friends we will go to some sports events (motocross & cars racing), not the best for me to check the AF module for a77II. What I want to photograph is swimming or birds in flight. Anyway maybe next weekend
I played a little bit with a77II last night and I can say now that Sony change the terminology of some function's that make me confuse and maybe also other people.
1) First time introduced with a77I (object tracking) just placing the object in the middle of the frame and then press the joy stick in the middle to lock on.
2)Then with a99 they added the option object tracking with shutter press (very good is my favourite) and you can start tracking in any Zone or focus point.
3)With a6000 they call it lock on AF. You can lock on an object with any sensor(contrast AF) or Zone (PDAF) but because the zones on a6000 are big sometimes is difficult to determinate the object but more reliable than the (1) & (2) since I think it use the on sensor information like colore contrast etc.
4)Now with a77II we have both systems in two different function
-Lock on AF with shutter
You can start tracking the object you have locked with any sensor, Zone or local expand and you can use it like on a6000 in speed priority mode at 12 fps (with a77 & a99) not available in speed priority.-Centre lock on AF or (on a77 & a99 object tracking)
This one work like on a77I where you have to place the subject in the middle of the frame and activate only with pressing the joystick in the middle and not is speed priority mode at 12 fps
You can not use both system together. When the one is activate the other one is not available.
Which one is the better? Definitely the Lock on AF is more flexible and user friendly and I find it similar to a99 AF-D tracking. The only restriction you have on a99 is the speed priority mode where is not available.
We have 3 different function of Object tracking/lock on AF
A6000, a99 with AF-D and now a combine system but you can use only one.
I will try today with the today events to see the new system on a77II but as I said is not the ideal events to test so lets see tonight when I will be back home