Corner Sharpness of the Canon 17-40mm f/4 L Lens on Full Frame | G Dan Mitchell Photography
Since the question of how the Canon EF 17-40 f/4 L performs across the frame for landscape photography comes up periodically, I have posted an older test photo I made last year (2007) - updated here to include a comparison corner and center sharpness. Technical data: Canon 5D. Canon EF 17-40mm f/4 L lens. Focal
