http://panasonic.net/avc/lumix/syste...lti_aspect.swf
if the sensor size is 17.3 by width, where is it getting the extra 1.2 mm?
the sensor size is maxed out 17.3 x 13.0mm,
when its in 4:3 mode, it doesnt use the full 17.3 width..
if its in 16:9 mode it doesnt use the full 13.0mm height..
gh1 is just maximizing the image projected by the lens instead of sticking with a 4:3 then cropping the edges for a 16:9 image.
4/3 will never be wider no matter how big its sensor gets. its limited by its lens.
i do think it gets extra dof due to its close focal flange.