Buy from Amazon.com : http://fave.co/1GnE3i7

Olympus M. Zuiko Digital ED 12mm f/2.0 Lens for Micro Four Thirds Cameras

Product Description :
High-speed single-focal-length wide-angle lens
Ideal for shooting high-quality dramatic landscapes and street scenes in low-light conditions
Full-metal body and a snap ring that enables photographers to pan focus with a distance indicator
This lens fits all Olympus PEN series camera bodies and all other micro four thirds camera