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Comparison at 21mm with Zeiss ZE 21mm Distagon

This page compares the EF 17-40/4L to the 16-35/2.8L II at 21mm, using the Zeiss ZE 21mm f/2.8 Distagon as a reference. All conclusions are based on viewing all the images as 16-bit TIF in Photoshop, processed from RAW.

The 17-40mm f/4L was a brand-new lens, supplied for testing by our trusted vendor B&H Photo.

The 16-35mm f/2.8L II was my own existing lens, one I know to represent about as good as one can expect, based on multiple prior samples of the original 16-35mm f/2.8L.

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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.

DAP includes thousands of pages of exclusive coverage and high resolution Retina-grade examples detailing Canon and Nikon DSLR bodies and their lenses, with in-depth analysis of sharpness and contrast, color, bokeh, vignetting, distortion, MTF, and flare, behavioral and practical usage.

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17-40 (left), 16-35 (right)

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