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It is a pretty fantastic lens. The only real weakness is that around 40mm and up the farthest edges and the corners don't manage prime sharpness (and QC).
Just looking at some f/2.8 shots, lots of specular highlights, white, crisp black next to white and yet not even a hint of LoCA fringing, just clean, clean, clean and so crisp with the micro-contrast. The lens is pretty much a real APO design when it comes to LoCA. Not many lenses are. Not seeing purple and green all over, it almost looks like what is wrong with this shot!
The lack of LoCA is a subtle and yet not so subtle at all aspect of this lens that is often overlooked what with all of the focus on sharpness.
In the past only extremely expensive lenses/designs have been APO and well actually I guess the trend continues looking at the MSRP actually.