There was the Leica heritage: the infinity mark at the right of the distance scale. To focus closer, turn the lens clockwise. When Leica copies, or "inspired" look-alikes came in, they followed: Canon, Zorkij, etc. There was the Zeiss school--focus counterclockwise. Nikon, Kiev copies of the Contax followed. Pentax did the same following Pentacon. Today, with adapted lenses, having a consistent standard for one's lenses does improve the manual focusing speed. To my knowledge Oly's EP cameras are the only to offer the choice of direction for native lenses manual focus-by-wire. So, my legacy lenses being mostly Nikon and Kiev, I set my E-2 to counterclockwise, so I don't get confused with the native lenses. How about you?