How much chromatic aberration?
If you take a picture in 12M Fine mode, you will see between 3 and 4 pixels of chromatic abberration at the outer edges of image. The best place to look for this is in areas of your photos that have sharp edges and changes in contrasting colours. Black and white areas are best. Magnify your images about 400-500% so you can see the individual pixels clearly and then hunt around the outside edges of your picture for examples. Because of the nature of chromatic aberration, there will always be more at the outer edges of an image than in the centre, where for almost all lenses it will not be noticeable.
