I use one on my D300, whilst it isn` as fast as my 300 F4,it is certainly not as slow as the tortoise it is often made out to be.I can`t compare to the lens you mention as I don`t have one . However,if you know of its limitations and adjust for them,it is a very handy,fairly compact zoom with a very good range. I have got images of dragonflies in flight with it,so it ain`t that slow..