In which film did Orson Welles use deep focus cinematography to enhance storytelling?

Orson Welles utilized deep focus cinematography to remarkable effect in "Citizen Kane," which is widely regarded as a groundbreaking film in multiple aspects, including its visual style. Deep focus allows multiple planes of action to remain in sharp focus simultaneously, enabling viewers to see foreground, middle ground, and background detail all at once. This technique enhances storytelling by providing context and depth to scenes, allowing characters and actions in different spatial planes to interact visually and thematically.

In "Citizen Kane," deep focus is used skillfully in various pivotal scenes. For example, in the famous opening sequence, the technique draws attention to the vastness of Kane's mansion while also capturing the intimate details of his surroundings, thus emphasizing the film’s themes of isolation and the complexity of Kane's character. The use of deep focus supports the narrative by allowing viewers to immerse themselves in the meticulously crafted world of the film, enhancing the emotional and psychological impact of the story.

The other films listed, while notable in their own rights, do not employ deep focus to the same iconic and transformative effect as "Citizen Kane."