oh. okok.
lets say i'm deciding to get EF70-200mm f/2.8L IS USM. for a further zoom range lense.
i need a shorter range lense.
got 3 choices to compare from EF-S17-55mm f/2.8 IS USM, EF-S15-85mm f/3.5-5.6 IS USM and EF-S17-85mm f/4-5.6 IS USM.
currently looking at 17-55 and 15-85...