![]() The Mark II is a significant improvement over the original 16-35—but only if you’re on a full-frame camera. The lens is markedly sharper at the edges and corners and more flare resistant. There’s not a big difference in center frame sharpness (which wasn’t a problem with the original version). For this reason, we don’t think those of you shooting T3i or 7D cameras are going to find this a worthwhile upgrade from the original. For 5DMkII and 1DsMkIII shooters, this lens addresses those issues that had some of us using manual-focus, exotic wide-angle lenses to get good edge and corner sharpness. There is still a little distortion at extreme wide angle shots, but nothing that isn’t easily corrected in post processing. Summary: this is the best wide angle zoom Canon has ever made. The others aren’t even close. Roger’s Take: This is a very good wide angle zoom and better than the Mark I in the edges and corners. It’s the wide zoom of choice for f/2.8 on a full frame camera. My hesitation with this lens has nothing to do with quality, it is very good. But if you’re doing landscape work and shooting at f/5.6 or higher the Canon 17-40 will provide every bit as good an image at a lower cost. If you’re shooting on a crop sensor camera (T3i, 7D), the 17-55 f/2.8 IS offers nearly as good an image quality plus the added benefit of image stabilization. If you need to go as wide as you can get, the 14 f/2.8 is wider and at least as good in image quality with probably less distortion. If you’re shooting wide in dim conditions, the 24mm or 35mm f/1.4 lenses are more than twice the aperture. All of this isn’t meant to sound negative. The 16-35 MkII travels with me everywhere because I need the convenience of a zoom, and sometimes I need f/2.8 on my full-frame. In my mind, the 16-35 II is to the wide end what the 100-400 IS is to the long end: a very good do-it-all lens. There are specific lenses better for specific tasks, but the 16-35 is good at everything. PLEASE NOTE: This lens requires 82mm front filters. Specs:Filter Size:= 82mm (nonrotating front element)
Links:MTF Chart:
Thick lines: 10 lines/mm; thin lines: 30 lines/mm. The darker black lines represent the MTF characteristics at maximum aperture; the blue lines at f/8. The solid lines trace the radical S (sagittal) curve, while the broken lines trace the tangential M (meridional) curve. If you are bored and don’t understand MTF charts, you can read about them HERE Lens Diagram:
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