Not had alot of time yet, but I did practice a few very basic shots around the neighborhood with this lens. The day was very overcast with just alittle blue sky here and there. Lens did excellent. Very sharp and VR seems much better than on my 70-200mm f2.8. Haven't tried any moving "targets" yet, but overall first impressions are good. Build feels nice and sturdy too. Lots of metal. The lens is heavy, but it is a 500mm lens. The weight should come as no surprise. I will have pics up on my 500px.com soon.