CANON EOS 5D MARK III with ZEISS MAKRO PLANAR F2.0 50MM Sample Photo 534049 By despman

Many thanks guys, this is my first zeiss lens,thus why I'm not sure if this is a normal behavior of this particular lens or not.

Greetings,
Sadly it is normal behaviour of makro-planar 2/50 Zx. It may be controversial aspect about the range of this chromatic aberrations. Looks here: http://www.photozone.de/canon_eos_ff/535-zeiss50f2eosff?start=1 (last photo and description at 'Bokeh Fringing / Longitudinal Chromatic Aberrations (LoCA)' paragraph). It is described as not much disturbing. Makro-Planar 2/50 is great double Gauss lens with outstanding close range correction of spherical abberation but it is not apochromatic lens in term of Zeiss's apo-chromatic definition. It has also wide difference between MTF performance at center and corner of image plane with wide-open aperture. Best regards, WZ.

This seems normal and actually better than most non corrected lenses. Chance are you won't be photographing rulers on a regular basis :) As far as Zeiss addressing this, they can't. It's just the characteristics of such a lens design. 9999999.999% of the time you wont even notice it on a regular photograph. There is always the Otus which takes care of CA but at a price.

Have a look at these. It will make you feel better :)
http://zeissimages.com/standardgallery.php?lenstype=441&showall