Light Meter

I was cleaning up my desk (tidying wires and cleaning "stuff containers") and i found this Ziess Ikon light meter. Still works, and should be very useful because I am using a Nikkor 105mm f1:2.5 which I bought in 1982 and am using with a Nikon D3000. In this configuration the Nikon only works on Manual mode. It does not provide any information other than the selected shutter speed. Sure makes one concentrate on the settings. The images are superb and worth the effort.