Over the weekend I went over to a photography shop, and they let me bolt various lenses to my SLR, including some seriously expensive ones. I took a few pictures, and was impressed. But when I got home and reviewed them at full resolution... wait, is that... chromatic aberration?!
Notice how the bottom letters are fringed in blue, and the top ones are fringed in green. I've never seen this effect with the cheap kit lens, so I'm a little alarmed to see it from an extremely expensive macro lens.
Is this actually CA? Or is it some effect of the lighting in the shop? (It's lit by "white" LEDs.)