cam·era 
/ˈkæmrə/ noun
plural cam·er·as /ˈkæmrə/ noun [count] : a device that is used for taking photographs or for making movies, television programs, etc.
off camera
: away from a television or movie camera : not on television or in a movie
▪ He is a different person (when he's) off camera.
▪ He is a different person (when he's) off camera.
on camera
: within the range of a television or movie camera : on television or in a movie
▪ He looks very relaxed (when he's) on camera. ▪ His attempt to break into the store was caught on camera. [=a camera recorded his attempt to break into the store]
▪ He looks very relaxed (when he's) on camera. ▪ His attempt to break into the store was caught on camera. [=a camera recorded his attempt to break into the store]
