Several years ago I had the privilege of spending an afternoon with Cole Weston at his studio. He was giving a presentation of his work, his fathers work, his then wife Paulette's photographs. The group of photographers were part of a workshop visiting from Germany and they eventually got around to asking questions about Brett Weston's technique. Some one mentioned they read that Brett didn't use a light meter and his negatives were perfect. Cole said something to the effect, well hell after that many years and shooting in the same light and he would bracket the hell out everything, one of them were bound to come out!
If you ever had a chance to see a Brett Weston print and hold it in your hands to really see it free of bad light and glass in front of it you would be amazed.