pwp said:You might glean a few well informed viewpoints from this piece from Luminous Landscape...
http://www.luminous-landscape.com/reviews/lenses/canon-17-40.shtml
My feelings would be that the 5D3 sensor will punish the old 16-35 f/2.8. It was never a stellar lens at the best of times, performing only adequately on film bodies...let alone FF DSLR. I had one which was a constant disappointment. By contrast, the 17-40 which I have owned since they were announced in 2003 has been consistently excellent, currently spending a lot of time on a 5D3 body. Provided you accept that it can be a bit mushy wide open, keep in perspective that from f/5 it is a match for the 16-35 f/2.8II.
If I was in your shoes I'd be going for the 17-40. If you NEED f/2.8 save some more for the 16-35 f/2.8II.
-PW
i agree sharpness wise, but the 17-40 beats even the mark ii 16-35 at 5.6+, and the 16-35s have harsh vignetting till f8. i say 17-40, because, you get the newer version, the bokeh on wa isn't really blurry on wa even if so, its f4 vs f2.8, you get 5mm more reach, and with the 5d ii iso, f4 isnt a huge issueKristofgss said:For the same price, the 16-35 would be the better option. When stopped down to F4, it is as sharp as the 17-40 and you have the advantage of being able to use F2.8 when you want to.
I'm thinking about buying a used WA lens. In your opinion, for almost the same price would you take the 17-40 F/4 L or the 16-35 F/2.8 L I. The 5D mark III would be the body to go with...
jondave said:Go with the 17-40mm. For L standards, the 16-35mm MkI isn't good at all.
Kristofgss said:For the same price, the 16-35 would be the better option. When stopped down to F4, it is as sharp as the 17-40 and you have the advantage of being able to use F2.8 when you want to.
AudioGlenn said:I'm in a similar predicament. coming from the 10-22 on a crop, I really liked 10mm. My main concern isn't the extra stop of light as I will probably be shooting at f/5.6 to f/8 anyway. I've read that in UWA lenses, 1 mm makes a big difference. Is the difference between 16mm and 17mm significant?