This is a high quality adapter. It has aperture control and is nicely weighted so it won't slip.
Fit your Nikon lens of choice to your Canon EOS camera like for example the Nikon 14-24mm wide angle for nightscapes.
New these are $225+ shipping (
http://www.mainlinephoto.com.au/category32_1.htm)
This one in new condition $175 including postage to Oz.
Greg.