Charts are fine but my real world experience show that at f/2 to f/1.2 CA is an issue. Nick is right, it is very slow to AF too. Its a great lens but its kind of the bastard child of focal lengths for me. I’d rather use my 135 f/2L which can focus closer and faster and is much lighter to carry around. Maybe one of these days Ill give the 85 another shot. I mostly shoot with primes now anyway, very seldom do I use my 24-70 and rig shots are done with the 17-40.