Last month, Cinema5D heard whispers that House would be filmed using the 5D Mark II with Canon lenses to achieve a specific look using shallow depth of field. Director Greg Yaitanes has said that Canon prime lenses were used along with the 24-70mm and 70-200mm lenses.
You can read the Twitter exchange with questions about the filming process on PetaPixel. Previously, the show has been shot on 35mm film. The series finale will air in the US on 17 May.