Please, can you say to me the meaning of phrasal verb "to lock down"; even not found at phrasal verbs dictionaries.
Thank You for your attention and corrections. Please, before adding some more context for my main question, I'll very appreciate if you can tell me the reason is better saying "tell" than "say to", and the same as for "in" instead of "at". This kind of nuances always worries me.
As for "To lock down", it is said in a text talking on the way camera is used in a movie according to the moment. First part has a hand held camera that moves a lot conveying dinamism, but when focusing in a depressed character named Ray..."Ray's life is very static and filled with desaturated colors, so we locked down the camera. These people live in huge spaces, so we take advantage of the widescreen format. Kind of trying to show the loneliness of it all."
Thank You again.