What do 16mm, 35mm and 70mm actually mean? What is screen masking and what is it used for? How does a dissolve work? And what is actually happening when the image on the screen stops moving and begins to melt? If you’re interested in finding out how films get on to the screen, Arsenal would like to invite you to take a peek behind the scenes on one of our projection room tours. Our projectionist Bodo Pagels will show you round the projection room, tell you all about film formats, projectors and projection techniques, demonstrate how films are fed into the projector and provide a full introduction to the secrets of film projection. He will also be happy to answer any questions you might have about the cinema set-up and will adapt the tour to your wishes and interests as far as possible. The next scheduled tour will take place on Saturday November 30, at 4pm. Please register in advance.