John, how should I angle the gray card in sunlight? I've gone through the archives on photo.net but I haven't read a concensus. You seem to have been through this meter calibration before so I'd like to hear and try what you say.(posted 8500 days ago)Charlie, I will consider Mr. Picker's book. I've heard less than glowing feedback concerning his understanding of the Zone System but I will try to keep an open mind when I read his book. Your comment about the amount of IR present seems to echo what I'm just now reading in Henry's "Controls in Black & White Photography".