here @ Sigma 85/1.4 sample gallery
they looks quite ok too.
It seems to have the same level of loCA's(red and green fringing) that all other fast lenses seem to be affected by too.
I thought that was supposedly one of the key features of Sigma's new SLD 'pseudo fluorite' lens coatings.
Motorbike shot at f/2.5 clearly shows this phenomenon.
Note tho, that Nikon's new 85/1.4AF-S is much worse affected.. and possibly the worst affected(for longitudinal CA) fast 85mm lens yet seen!
Even with all this in mind ... at the right price, this lens may be worth it.