I have had the 16-35 f/2.8L I for years. I just bought the 16-35 f/2.8L II.
I took shots at 16mm F/2.8, 4, 5.6, 8, 11, 16, and 22 and then 35mm at the same apertures with both lenses.
At f/2.8 the ver. I is softer at the edges and even a little softer in the middle.
At f/8 they are closer and at f/11 and up there is only a little difference and only at the edges.
I have decided to keep the new one although it is a tough decision.
Is it worth the $500. for the upgrade? I'm not sure. (Even the 82mm CP costs over $100. more.)
I plan to get the TS-E 17 for when I have the luxury of time to putz around with it for special shots. I will use the 16-35 f/2.8L for quick shots and travel.
Am I crazy?


as Canon simply hasn't got the Nikon 14-24 version, only Tokina has it's corner to corner sharpness.
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