Was at the event this afternoon and test fired the 200-400. It is a very heavy and huge lens although did not have a chance to hand held. The focussing is very fast, even with the 1.4TC in action and the zooming is smooth. From the test shots and from reviewing the pics thru the viewfinder, seems to be quite sharp. Was told by one of the Canon guys that estimated RRP is probably around S$16k and Canon will only start production in the 2nd quarter. Maybe someone from Canon can confirm this. IMO, it is quite a versatile lens and if it is around 10K-12K street price, maybe can consider