A murder of crows. Not the most exciting or rare birds, but they posed nicely while I was testing out my new 1.4x TC III with taped pins on my 400 5.6 and 6D. The AF is a bit slow and indecisive, but it seems to work. The killer is having to shoot at f8 and 1/640s in less than bright light. The ISO really creeps up and starts to steal detail. This is where IS would be a huge advantage.
