I have a Sigma 19mm coming from B&H and it will be here Monday. I much prefer prime lenses and really needed something in the 35mm full frame equivalent. I primarily use the Panasonic/Leica 25 which is an absolute beauty, but is a tad too long at times. The Oly 17 is the perfect focal length, but I don't think I would be happy with the IQ. So... Sigma it is. I'll post pictures after I've had a chance to use it. Maybe, just maybe I'll get to use it on my EM-5, Oly charged my card for it today. Why does everybody list their equipment in their sig? I should list the mile long list of Minolta manual focus that I have. And yes, I do have a Minolta adapter for my Pens.