Please see the 21mm comparison page for details.
Mouse over the image below to compare the 17-40 to the 16-35, or click for larger view.
Both lenses show faint “wave” distortion: barrel distortion centrally, and pincushion distortion towards the edges and corners.
The 17-40 show notably stronger barrel distortion, the 16-35 is clearly preferable here at 21mm.
Article continues for subscribers...
Already a subscriber? CLICK HERE TO LOG IN
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.