For starters, the Canon EF 14mm has exposed front element and rear gelatin filters. Very similar to the EF 15mm fisheye. Per reviews I've read, the Nikkor 14-24mm has better IQ than the EF 14mm & EF 16-35mm, and I just checked Amazon - the Canon EF 14mm costs $2,250 and the Nikon 14-24mm costs $1,920.
I have an EF 17-40mm f/4 and an EF 24-70mm f/2.8. If Canon brings out a reasonable competitor to the Nikon 14-24mm and improves the EF 24-70mm's IQ, I would uppgrade the two lenses I have with the two new lenses.
Not to detract the thread too much but is it possible to make a 24-70mm that doesn't externally extend while going through the focal lengths and if so how much additional costs would that tag to the price? I could have sworn at one time Sigma made such a midrange zoom lens.
Easy, just add more plastic around where the barrel would extend, put one token piece of glass on the front, and keep the rest of the design exactly the same
(and then the lens is permanently as long as the longest it is now)
Or don't even put a piece of glass on the front, a la the 16 - 35 L.
Also, I think the 14-24 would do more wonders for canon than they realise, especially if it's f/2.8. It would attract a lot of 7D (maybe even 60D) buyers, as an upgrade path to a Full Fram eventually. Sure, the 10-22 is wider, but i'd put up with 'only' 14mm until i upgraded to FF, and the only other fast/2.8 option is the Tokina 11-16 (i'd take a Canon FF compatible and probably better IQ if it's an L, over the Tokina for 3mm wider and probably a lot cheaper).