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    Crops at 24mm — Focus


This is the precise spot focused upon using Live View.

The 14-24 and 24-70 and 16-35 hardly change from f/2.8 onwards, though the 14-24 shows its usual drop in micro contrast from f/4 to f/5.6.

The 16-35 seems particularl talented at 24mm, showing impressive micro contrast at f/5.6, which immediately suffers a slight loss of contrast at f/8 from diffraction, which declines further at f/11 - f1/6. When performance is tops at f/5.6, such differences become clear.

The 17-35 is hazy wide open at f/2.8, improving hugely to f/4, and catching up at f/5.6, but it never matches the 16-35 or 24-70 or 24/2, though it comes very close.

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Since 2006, Diglloyd Advanced Photography is the authoritative review and reference for DSLRs and their lenses: Canon and Nikon primarily, but also Pentax and some medium format. Reviews of key DSLRs are included, but the primary focus is on lens performance. Also included is a wealth of technique and workflow approaches.

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