you can pm pq23. basically there are 2 types of adapter.
one with a chip and the other is without chip.
both are to be focus manually.
the one with the chip will have the LED flashing in the camera(telling you it's focused)
the other one will have to focus by your eyes(you loose auto focus), there's no LED to tell you. A disadvantage of without the chip is, there is no center split screen in the viewfinder, it's quite difficult to focus(especially in low light). Agar-agar