Micro Four Thirds has the same sensor size as the Four Thirds System .
Micro Four Thirds replaces the complex optical path needed for the optical viewfinder with an electronic viewfinder displaying a live view ; this allows for smaller and lighter lenses and bodies .
Micro Four Thirds has the same sensor size as the Four Thirds System but replaces the complex optical path needed for the optical viewfinder with an electronic viewfinder displaying a live view ; this allows for smaller and lighter lenses and bodies .