One of the early ideas regarding the simplicity first and foremost was to use only a single lens throughout the entire film, as to depict the film through the eye of the beholder and not through a camera.
This meant that they couldn't use a zoom lens and just state they "shot it using one lens", but instead needed to find a prime lens with a field of view similar to the human eye.
Shot using a single lens
So what is the ideal focal length when trying to match the field of view to that of the human eye? When they were trying out different lenses, they landed on the focal lengt of 35 mm to capture the "feel" of a person watching rather than a camera filming.
Since this film was shot on a Super 35 film camera, the 35 mm prime lens is the equivalent of a 50 mm lens on a full frame camera and a 25 mm lens on a micro four thirds camera.
Critical Success and Awards
Call Me by Your Name premiered on the Sundance Film Festival on 22 january 2017, where the audience simply loved the film. It went on to win several awards, including an Oscar and a BAFTA Award for Best Adapted Screenplay.