Better than the EF 16-35mm f/4L IS USM at equivalent apertures, and mostly equal-or-better at maximum apertures: 16mm: EF 16-35mm f/2.8L III USM @ f/2.8 = -2.6 stops at corners EF 16-35mm f/2.8L III USM @ f/4 = -1.8 stops at corners vs. EF 16-35mm f/4L IS USM @ f/4 = -3 stops at corners. 24mm: EF 16-35mm f/2.8L III USM @ f/2.8 = -1.3 stops at
Such high vignetting we haven’t seen so far in our tests. At 16 mm and by f/2.8 in the frame corners disappears 75% of light (−4.07 EV). On stopping down the aperture to f/4.0 the situation improves but still the vignetting remains very high, reaching 57% (−2.47 EV).
The native-mount Sony FE 24-70mm f/2.8 GM Lens will be the head-on competition for these kits. In the Sigma vs. Sony comparison at f/2.8, the Sony shows as the modestly sharper lens at most focal lengths and also shows less lateral CA at 70mm. I see the Sony still holding the slight edge in the f/4 comparisons.
Dedicated to the Canon EF 16-35mm f/2.8L III USM lens, the EW-88D Lens Hood helps to minimize flare by deflecting stray light from entering the lens. The hood also provides additional protection to the lens from accidental impacts, bumps, or scratching. It is offered here as a spare or replacement for the hood originally included with the lens.
Also DXOmark tests ( with 5D3 ) indicate for the EF 35mm f1.4 L II, a T stop of T 1.7 the EF 35mm f2 IS a T stop of T2 . Very little actual light transmission difference. For the f1.4 L II lens the sharpness is 18 mp. For the f2 IS lens the sharpness is 20 mp. Slightly better for the f2 lens. For the f1.4 L II the vignetting is 2.2 ev.
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canon ef 16 35mm f 2.8 l iii usm samples
