<p>Canon may also be waiting to see how the EF 200-400 f/4L IS 1.4x sells, would people really hold off buying it if a new 100-400 was available?</p>
HUH?? at a price of $12,000....compared to say...$3000 at the high end for a updated new 100-400...I dont think the 200-400 is even on anyones radar except for the high rollers who actually "use" the lens everyday for its intended use... I'll never buy a 200-400 at my level maybe rent a few times and thats it..
Agreed, there's really very little shared ground (market share) for these lenses. Now if Canon would release a 200-400 f/4 without the built-in TC, that would be something of a different story (I think Nikon has a great offering in this respect).
5D3, 5D2, Sony α6000, S90 | SY14 f/2.8, Ʃ20 f/1.8, 24 f/2.8, 35 f/2, Ʃ35 f/1.4A, 50 f/1.8 I, Ʃ50 f/1.4 EX, 100L Macro, 17-40L, 24-105L, 70-200 f/2.8L IS II, 1.4x II, 70-300L, 100-400L | E-mount: SY12 f/2, Ʃ19 & 30 f/2.8 EX DN, 16-70 ZA OSS, 55-210 OSS, Metabones SB | FT-QL, AE-1P | FD(n) & FL lenses