The Olympus M.Zuiko Digital ED 60mm f2.8 Macro ($499.99 direct) is a weather-sealed lens for Micro Four Thirds cameras that produces the field of view equivalent to a 120mm optic in full-frame photography. It can focus on objects as close as 7.4 inches, which allows for true 1:1 macro magnification.
Expensive; Soft edges at f/2.8