The delightful Samyang 14mm.
With a download to correct distortion in LR4, it’s good to go. Pretty sharp – actually amazingly so for such a reasonably priced lens – both DXOMark and Photozone.de agree, it kicks the butt of lenses nearly 10x the price.
Just set the camera to M, and the focus distance to 3m, (everything from f2.8 – f16 will be fine at 3m) and adjust your shutter speed and ISO to get the exposure you want.
Very cool. I love the way suburban London looks so big, great building separation.