i use an EF70-700f2.8IS ,EF70-200f4 IS, the 100-400f4.5-5.6IS USM, EF 28-300f3.5-5.6IS USM,EF-S17-55f2.8 Is USM, an EF-S17-85f4-5.6 IS USM and the EF-S10-22f3.5-4.5USM... i like and use all of them the two best being the EF-S17-55 and theEF 70-200f4.0 for IQ and walk about lenses,, the others for specifics needs