Chris - it's a hand-held 1/25th 58mm shot at ISO 12800 and f/1.6... I wouldn't expect the image quality of an f/8 on a tripod in mid-day.
Does this camera really go FOUR stops higher than this? The noise is well controlled albeit pretty obvious. The CA exhibited here though looks like it's come out of a fifty buck camera [that's a LOT less than £2,750, right?]- is this indicative of final quality?
This was taken with a production spec camera.
Does the amount of CA on this surprise you, Richard? I wonder if it's an effect of the high ISO - that's one very high-spec lens...