OMG! Is that a open Matte print I see? The Blu-ray has a aspect ratio of 1.85:1, so your print at least has the benefit of extra picture information.
Yes. When projected projectionist must give the format of 1.85: 1 as wished by the director. Sorry my English I use google translator 😃 Sometimes it is seen microfone or somewhere a piece of canvas 😃)