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Canon 16-35 F4 Review vs. 17-40 Shootout | Canon Rumors - Your best source for Canon rumors, leaks and gossip
Jeff Cable's Blog: Comparing the new Canon EF 16-35mm f/4 USM IS lens to my older Canon EF 16-35mm f/2.8 II USM lens - Should I switch?
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Canon Wide Angle Zooms comparison/review: 16-35/f2.8 L II v. 17-40/f4 L | The Terra Galleria Blog - QT Luong
Zeiss Vario-Tessar T* 16-35 f/4 OSS ZA — Drew Gray Photography - Architectural / Interior / Landscaping
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