Recently, I’ve been watching the films of Yasujiro Ozu, who was famous for shooting exclusively (as far as I know) with a 50mm lens. It got me wondering which focal lengths were most common and/or most utilized during the 1930s and 40s in Hollywood. One of my favorite films is Casablanca, which looks a bit wider angle than a 50mm to my eye, though I’m by no means an expert. Any wisdom that can be shared would be greatly appreciated. I love details about cinema history and technique. Thanks!