I am sorry I should of been more specific. I was only trying state that was not shooting the lens wide open and had it stop down a few f stops.
The reply I gave was to Elford when he was wondering what focal lengths I was shooting at, this is where the 19mm and 50mm focal lengths came. Sounds like I may have to use a stop this lens down to a f11 to get rid of that fringing
No, if you read the photozone review, you will see that stopping down does not substantially improve CA when shooting at around 15mm or 85mm. If you look at the picture (100 percent crop from the corner of the frame) I posted, you will see that it shows substantial CA even though it was taken at f/11.
The conclusion is that to get rid of that fringing, you either need to shoot raw and use software to get rid of it, or stay away from the extremes of the focal length range when taking this kind of shot.