Strong buy recommendation and 5 stars

Everything has been said several times on this positive lens and I agree with that absolutely.

The Nikon 2,8er alternative to almost twice the price, may be better in areas a bit,
but that detracts from the excellent performance of Sigma`s in any way.
Autofocus (Internal Focusing) hits fast, quiet and precise. OS works really well.
The handling ideal, I put the lens on my left (holding and at the same time supporting) hand and can easily turn to the index finger the wide, soft current zoom ring.
Better it can not be.

The image quality of the Nikon D300 is and remains simply class.
Open shutter (Figure softer) at all focal lengths, without limitation available.
For portraits very well, with optimal free parking properties and stunning bokeh.
Dimmed to 5.6 to 8 (this is under normal daylight conditions even with polarization filter almost always possible)
excellent, sharp and brilliant.
Posters enlargements in 50 x 70 cm prove it.

General or even practice-oriented quality deficits are not detectable for me.
Unless you're looking for with the big magnifier and all meticulousness after supposedly bad.
But I delight in above-described.
Simply to really good imaging and manufacturing quality and a great handling.

Strong buy recommendation and 5 star because I am completely satisfied.