from: http://www.engadget.com/2011/09/01/olympus-pen-e-pm1-hands-on-video/:

Join the family of products is the Olympus Pen lovingly nicknamed  Mini PEN , or E-PM1. Compared to its big brothers the PEN E-PL2 and PL3-E , this little guy packs a serious punch tiny body, with a price tag as low as $ 500. But that may CIT claiming Olympus offers quality DSLR in a compact design stack against the big boys in the pit at the U.S. Open? The 12.3-megapixel camera comes with a 14-42mm lens f / 3.5-5.6 kit and includes a Micro Four Thirds mount, allowing it to accept the compatible goals of both Olympus and Panasonic – something that was really easy to get the hang of Speedy for switching between sets. Consult impressions that we will practice with the camera to one of the greatest games of tennis of the year.