Have read the different posts and have taken my grey card shots with my Nikon D2X. They have not yet been transferred to my PC.

I noticed that when taking the grey card shots my auto-focus kept zooming in and out trying to focus, but unable to do so. I read in my Nikon instruction manual that some subjects which lack contrast can fool the most sophisticated auto-focus system-so I had to turn mine off and use manual focus. Anyone else had this problem?

Also on page 17 of the module handbook, you are advised to use spot metering of the shadow and highlight areas of your landscape pictures. What would happen to the readings if I used Matrix metering instead of spot metering? Am just curious!!!

Chris Gryce