The ideal wildlife lens

An answer to a rival's challenge..
Canon came up with an interesting lens for wildlife photographers.
It was announced last year, but production was delayed.
The EF200-400 F4.0L is an unique lens that features a built-in 1.4x teleconverter.
This means the maximum focal length can be increased to 540mm.
If you use a cropped-frame, you'll get roughly about 896mm in focal length.
The only lens that covers such a length is the Nikon 200-400 F4 ED VR.

The EF200-400 F4.0L 1.4x

Its gonna cost a bomb!
The built-in 1.4x teleconverter means you don't have to lug more stuff on your trip to the jungle.
I think it will be an ideal lens for capturing birds since the entire barrel can be carried handheld.
Word has it that the street price is roughly around USD$6 - 9k a pop. But that is only a rumour.
What's really impressive on this lens is the fact that its also fitted with an image stabilizer and its ultrasonic motors are virtually silent.
Fit this with the EOS5DmkIII's silent shutter mode, you have a winner...

A closer look at the AF, IS and teleconverter controls

Something we can look forward to..
I guess we would have to wait a little longer for this lens to show up, but it would defenitely be worthwhile!