I currently have the 17/1.8, but decided to try out this lens, thinking I might want to swap out the 17 in favor of the 15. Big brown truck delivered the Summilux today, just as I was heading out the door to our local Super Frys in North Scottsdale. This is an amazing market with a luxury lounge with big leather chairs and sofas & big screen TVs for non-shoppers to hang out in, a wine bar, sushi bar, and an incredible selection of pretty much everything you can imagine. I thought it would be a great opportunity to test out the new lens! Anyway, I grabbed a few snaps with the E-P5 and Leica 15mm Summilux as I went through the market. These are pretty much just quick snaps, as I tried to not be noticed taking pictures in the market. Many retail establishments frown on that sort of thing, so I tried to be very quick and low key about taking pictures. I set the E-P5 to A, aperture at 3.5, ISO on auto and had at it. I'm really happy with how well this lens did in this limited test. This was obviously a very casual test of it, but it performed to expectations for the pedigree. The E-P5 did an outstanding job as well. It is my favorite Olympus body at the moment. You can't tell in these internet samples, but pixel peeping reveals fantastic sharpness and clarity in the fine print of these labels... even at the edges. Nice job, Panasonic!