I have a full kit of Canon gear but never got to the 24-70 f2.8(I have the 24-105mm f4.) I am now building up my nikon kit based on a D800. I started on the basis of cheaper primes 35mm f1.8DX, 50mm f1.8, 85mm f1.8 and Sigma 150mm f2.8 OS. However, after a week or so, I really missed the convenience and picked up the cheap Tamron 28-75mm f2.8. I use it for studio and landscape stopped down pretty far, f5.6-8.0 and it seems OK. Of course this may just be putting off the day when I but the real nikon on Well there is always Ebay to sell it on!