My personal view... Wide-angle lenses like 14mm, the need of f/2.8 is not that necessary. Such a wide landscape lens, mostly used aperture will be >f/8 in most situation.
My only concerns for the 14-24 is:
i. Colour/contrast output.
ii. CA & Sharpness issues.
iii. Distortion control of the lens.
Current already see some disadvantages in the lens already.
i. Cannot use a Front Filter by the looks of it.
ii. Using a CirPL will be a question cos the lens dun seems to have a rear filter slot also. Even if it does, the cost of the rear Cir-PL is expensive as it would have to be manufactured to a much better quality coating and glass than those front mounted ones and also have a gear dial for turning the filter.
iii. Built-in Hood is not that easy to keep, cos the front dia with hood should be ard ~100mm. Not to mention the front lens cover will be a cap like those of a fisheye and increase another 2-4mm to the dia. Scratching the front element is unavoidable with a protude from element. And the question on cost in replacing the hood if it cracks/breaks... :dunno: From experience, NSC will tell you that the hood comes in as a front component with the front lens element most probably, ~$300 maybe. :bsmilie:
But we still have yet to see... November we shall clear our doubts.