There are several mid range zoom lenses in the Pentax range, including this 17-70mm with a constant aperture design. Is this one of the best choices for Pentax users, or has it been overtaken by more recent lenses? Let's find out.
Very good central sharpness; Excellent central CA control; Focuses very close; QuickShift focusing available; Silent AF; Constant aperture design
Lower edge sharpness; CA at edges at 17mm; AF not the fastest; No weather resistance