The Olympus M.Zuiko Digital ED 12-40mm f2.8 PRO ($999.99 direct) was launched along with the company's top-end OM-D E-M1 camera , adding a true professional-level zoom to its Micro Four Thirds lens library.
Maximum f/2.8 aperture throughout zoom range; Very sharp from edge to edge; Focus clutch system; Protected from dust, splashes, and cold temperatures; Minimal distortion
Expensive; Lacks optical image stabilization