Debuting at Berlinale Film Festival 2018, Steven Soderbergh’s “Unsane” proves that you don’t need expensive equipment to shoot like a professional. Shot entirely on an iPhone in 4K, Steven Soderbergh’s Unsane serves as a compelling case study for the potential of smartphones in cinema. The film depicts Sawyer Valentini (Claire Foy), a victim of stalking, who, attempting to start afresh, relocates to Pennsylvania where she finds herself involuntarily admitted into a mental health facility. She begins to question her sanity when she believes that one of the staff members is her stalker and her life is at risk. Soderbergh’s creative choice in shooting Unsane on a smartphone is effective in evoking the sense of paranoia and voyeurism. In the opening sequences, the agility of such small cameras enables him to shoot Foy from a voyeuristic distance; made especially effective as she is often semi-obscured by foliage or other barriers, making the audience feel like her stalke...