Near left frame edge.
The 14-24 looks great wide open at f/2.8 and also at f/4, but it then shows its usually loss of micro contrast at f/5.6, an effect which is puzzling, but consistent.
The 16-35 looks great wide open at f/4, and maintains its contrast very nicely, and seems to hold its contrast slightly better than the other two lenses at f/16.
The 17-35 exhibits its usual haze at f/2.8, but crisps up nicely at f/4 and shows great contrast at f/5.6, which it holds well as it is stopped down.
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