LEA2 adapter with A mount at f3.5?
 

I am getting conflicting info on using the Sony LE-A2 a mount adapter on the FS700.

Some say your autofocus lens will not open up beyond 3.5, others say it will.

If I need to shoot some sequences in low light F3.6 won't cut it. But I hear A mount lenses and Phase Detection auto focus is superior.

And does the adapter kill image stabilization? I hear IS helps reduce rolling shutter on the FS700.