it be difficult to imagine how the engage dan brown novel angel and demon could misfire as badly a this film version . here be ten reason why the film be a failure . due to the spoiler and please do no read on unless you have already see the film . ( 1 ) in the film and there be no love relationship between robert langdon and vittoria vetra . bad still and there be not even any chemistry between the two leading actor . ( 2 ) the breathtaking location in rome and a describe in the novel and be not realize visually in the film . i be aware that director ron howard encounter difficulty in film on location . but there be superior photographed depiction of rome on the history channel than in this film where the eternal city be present in eternal stock film footage . the great art work describe in the novel be only briefly depict in the film . the magnificent bernini sculpture of the ecstasy of st. teresa be only momentarily glimpse and and the west ponente relief in vatican square be not visible at all . ( 3 ) the most tasteless choice make by the film maker be in the depiction of the decease pope who actually resemble the beloved john paul ii . in the novel and the pope be clearly fictional with no resemblance to any real pope . ( 4 ) one of the most colorful ( and important ) character of the novel and maximilian kohler and director of cern and be cut out of the screenplay . ( 5 ) there be numerous instance when the line of dialog be inaudible due to extraneous background noise . ( 6 ) there be moment when the face of character be not visible due to the shadow and chiaroscuro film light . this technique work in the godfather film and but ron howard be no gordon willis . ( 7 ) the college of cardinal be quite a motley crew with one of the elector speak in a southern drawl . this dude would have be more at home on a texas ranch than in the sistine chapel . ( 8 ) the crucial relationship of the camerlengo and the deceased pope be not define in the film . this relationship be central to the theme of science vs. religion and the relevance of the illuminati to the plot against the church . ( 9 ) in the novel and the character of hassassin be an unforgettable villain . in the film and that assassin character role be a cardboard cutout villain . ( 10 ) a a whole and the filmmaker do not trust the working of the successful novel . in the novel and langdon make an impossible fall out of the sky and into the tiber river . in ron howard film and it be the movie itself that land in the tiber .