This sale is for a genuine Mamiya 645AF Extension Ring No. 2 (NA402) to fit all of the Mamiya 645AF / Phase One auto focus cameras. It is in really excellent condition.
This extension ring is in perfect mechanical and electronic condition, and you can download a copy of the Mamiya instructions from this website. Apart from that there is not a lot to say – everything works perfectly. There are only very minor signs of use, mainly some paint loss on the lettering; it s just not quite as new. Please note that no caps are supplied with this extension tube.
This extension tube will give you 0.29 to 0.45x magnification with a standard 80mm lens.
I tend to use these rings just to get a closer focus with my 150mm and 210mm lenses – it is so small that it is no problem to carry around in case you need it.