The lens is billed as a macro, and definitely is close focusing, but at 1:4.5 ratio, it doesn't really compare to a real macro. OTOH, it is superb for closeups of large flowers (roses, irises, whatever these bluish ones are...).
So, I've taken a bunch of shots with my Pentax K200D to demonstrate the lens (actually for fun, but I thought you might want to see 'em). Most are at f/2.8 or f/4, to show off the bokeh, but there's a few stopped down. Sample photos are in this gallery now
In the gallery, you'll see one boring shot with a crop of the sun with a backlit branch. I see no significant CA, however, the lens does tend to suffer from flare, so a good hood is advisable as is keeping the sun out of the frame.
A few samples...
