nekon wrote:
Two points:
1. the palm of your hand reads zone VII, one stop lighter than 18% grey-so you will need to close down one stop.
2. your camera can give incident light readings, by attaching an "expodisc", (about $100), or what I use: one thickness of white coffee filter, cut to fit, and fixed between two screw-on uv filters-gives perfect results every time, and doubles as a white balance filter-just attach to lens and point at light source.