I recently picked up an Olympus Zuiko 21mm f/3.5 to serve as a wide-normal (~35mm) lens on my 10D. While it's terrifically sharp (on par with my 17-40mm), what mainly attracted me to it was it's size. It's so small that the UV filter I put on added significantly to it's length.
Here are a few shots from tonight with the Zuiko.
