I'm continuing my read of "Walker Evans", the autobiography by Belinda Rathbone. We're into the early and middle 'thirties now. In one paragraph describing how Walker Evans was instructing one of his friends how to make photographs, he says, "... Set your camera for 1/20 second. Use f/9 on the shady side of the street and f/45 on the sunny side. ..."
Great street shooting advice. That works for about ISO 200 ... Hmm. I don't have many lenses that stop down past f/22, though.