If landscaping is your thing or you commonly shoot between f/5.6 and f/22, the 16-35mm @ 24mm (actually, the sweet spot on that lens) fared fairly well, but still short, with regard to picture quality versus this lens - these lenses cost about the same.

If landscaping is your thing or you commonly shoot between f/5.6 and f/22, the 16-35mm @ 24mm (actually, the sweet spot on that lens) fared fairly well, but still short, with regard to picture quality versus this lens - these lenses cost about the same.

Sweet spot is f4.5 but that sweet-spot is wide