All the lenses benefit from f/5.6, though the 16-35 looks good wide open at f/4.
- At f/2.8, all three zooms produce a reasonable image, but all are a bit smeared and lacking in contrast.
- At f/4, the 16-35 produces the sharpest result, though its darker than the others from vignetting. Impressive, since the 16-35 is wide open here.
- At f/5.6, the 16-35 and the 24-70 are looking the best, with the 17-35 and 28-70 very close. The 28/2 is still soft with low contrast.
- Results at f/8 are similar to f/5.6, but with an uptick in contrast for all lenses. The 16-35 shows the highest micro contras, but barely, all the lense are excellent here.
- At f/11, nothing is gained over f/8.
- The 28/2 is smeared at f/2, and requires f/8 for a sharp result, showing a “pop” from f/4 to f/5.6 and then looking good at f/8.
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