Pentax heretook the market by storm in 1976 when they showed the ME and MX because the Olyumpus latest line in the SLR market was the diminutive OM1 made 25% smaller by the use of electronic controls over traditional mechanical mechanisms, but the ME came with a revolutionary slim "pancake" lens only 10mm long that let you put the camera in a fairly large pocket..Sony are employing a Carl Zeiss Lens that uses optics that have elements that not only have focus inturnally but have somehow done this without the 'consetina' movements!