Up to 55 mm lens 24-105 4L is real good.
Could you please, Andy Westlake, post a few test images made with some L-series prime wide lenses?
This picture is the best MKIII sample so far. Nice sky colors. I`d like to see some clouds to check the details....
Fantastic shadow and highlights detail! Brilliant color gamut , clarity and perfect moderate sharpness! Bravo Canon!