Version four of the Olympus PEN camera line, the E-PL2, came out in January with a couple of notable improvements including in-camera advancements, alternate lens options and 720p HD video.

In-camera features include "live guide" playback for reviewing and editing video and stills in real time, the ability to overlay multiple creative filters, a higher ISO sensitivity (6400) for lower-light shooting. New "eye detect" autofocusing reduces blur by tracking up to eight sets of eyes before releasing the shutter...