Thanks. I don't have the spot meter accessory for my Luna Pro. However, I think this should work by using reflecting metering and metering off the sky and the trees and the body of water in front of me, I can average the value. This should give me somewhat of an accurate reading. No, I don't want to carry my 30D with me while shooting with my medium format body. Obviously, incident reading may not be accurate because the area I am standing is generally under shades.