Out of the five lenses I currently own, Vivitar 8mm fisheye, Sigma Art 14-24mm f2.8, Sigma Art 40mm f1.4, Sigma Art 105mm f1.4, and the Sigma Sport 120-300mm f2.8, mine is my Sigma Sport 120-300mm f2.8. It stays glued to my D5 and is the first thing I grab when I'm headed out the door if a camera is going with me.