Compared to 85/1,4 AF-S, the new lens seems to give a bit higher technical image quality but I don't really consider the difference huge; both lenses are excellent. What the 105 offers for me is alternative spacing: for example I use the 24-70 a lot, and if I need a lens for head and shoulders, the 85 fits the bill but is close to the 70mm end of the 24-70 so it may or may not be worth carrying a separate lens. The 24-70+105 combination offers a greater distinction between the two, and thus I would more likely pair these two. Then the jump to 200mm is also smaller and there is less of a gap. I expect to be using 24-70+105+200 a lot. Compared to the previous 105's from Nikon, the 105/1.4 offers a larger aperture and better autofocus. A disadvantage is the rather large size of it, but that was expected. It balances well with the D5.