I have a question about the way, a sequence is shot during the final duel between Harmonica and Frank. I would like to how the "close up" was done for Harmonica? During the first sequence, they zoom in to do a face "close up". In the second sequence, they do a "close up" of the eyes. Was it a simple lens "zoom in"? Or, was it a dolly assisted "close up"? Please clarify?
In his book, Frayling has a picture of Leone, Fonda, and a camera, with a caption that says something like "Leone lining up a closeup of Henry Fonda," so I'd guess that the closeups were shot separately. In fact, I recall someone saying (it may have been Eastwood, not sure), that while most directors shot the closeups after all other shooting was done, later in the day even if light wasn't so good, Leone always shot his closeups at the same time as the other scenes while the light was good, cuz the closeups were very important to him.
Based on this, I'd guess that Leone indeed lines up the closeups separately, rather than simply having a camera zoom in on the actors' eyes while a scene was shot.