Left edge of frame
The 14-24 is sharp wide up but low in contrast, but crisps up very nicely to f/4, and adds a bit more contrast at f/5.6. It shows some traces of color fringing (lateral chromatic aberration) as red and cyan fringes.
The 16-35 is also sharp wide open and also low in contrast, but f/5.6 crisps up very nicely and has less color fringing than the 14-24, though not free of it.
The 17-35 is smeared and hazy at f/2.8, improves some at f/4, then shows a very crisp and contrasty image at f/5.6, with little color fringing.
The 20/3.5 is smeared an aberrated at all apertures and never cleans up. It is not a lot better at f/8 than f/4, other than reduced vignetting and somewhat less smearing.
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