revup67 or anyone-can you explain the "blurry" left upper corner on the full sized version in the Holy Falls picture. What is the cause of that? Is that always present on the canon 16-35mm lens. I purchased one and then sent it back because I noticed this in the left and right 1/5 of the frame at wide angles less than 20mm. Is this present on all wide angle lenses and am I just being to picky?
When you spend as much as we do on these lenses, there is no such thing as too picky. Aim for perfection.