sentences:  They often display the cinematic apparatus and have an open narration.Travelogues were usually about eighty minutes in length, consisting of two 1000-foot reels of 16mm film, with an intermission in-between to change reels.The travelogue film speaker, often but not always the filmmaker, would usually introduce each reel, ask for the lights to be dimmed, and then narrate the film live from an onstage lectern.