Hello friends, I need your experience between Nikon 12-24mm VS Tokina 12-24mm. I would like to use it on my D7k for landscape. The only reason why I don't buy Nikon is the price, I am looking for used Nikon (600) and Tokina (350). I almost bought Tokina, but would like your opinions first. I will not consider any other lenses. Thank you.