Olympus - M. 17mm f/1.8 Wide-Angle Prime Lens for Select Micro Four-Thirds Interchangeable Lens Cameras - Silver

17mm is 34mm on a micro four thirds sensor and almost 51mm on a super 16mm sensor. It makes a great wide angle street lens on a panasonic or olympus body. I use it as a standard video lens on a blackmagic pocket cinema camera. The focus ring has 2 settings that can be changed like a clutch. In auto it is focus by wire that spins infinitely. In manual mode there is a distance guage and hard stops. Very versatile and useful. Not to mention fast and sharp image in a golf ball sized lens.

Pros: It's a great compact size, the pump action focus ring is really handy and the focus is very fast and silent. Cons: Pictures arn't as sharp especially in the corners compared to other prime lenses like the Panasonic 20mm f/1.7

This lense is awesome. A clear example on why I switched to M4/3. I only wish a lens this (relatively) expensive would come with a hood!