微4/3系统
The Olympus PEN E-PL1 is a digital camera made by Olympus announced on 3 February 2010 and replaced in 2011. It was Olympus's third camera using the Micro Four Thirds system after the Olympus PEN E-P1 and Olympus PEN E-P2, and the first camera in Olympus' "PEN Lite" line.