Great pics too man. Do you have a link to your photos i would love to check them out also?
Just took some pics of a visit from some high ups at Jaguar/Land Rover NA. I decided I would try the 50/1.4 to see how well it worked, and man it's awesome. Only complaint: tons of purple fringing, but I just desaturated purple and magenta and it cleared it right up.
IMG_4738 by robertwsimpson, on Flickr
Maybe fool around with your in-camera settings like your picture styles, and color balances within the camera.