lilama45-1

Hello everyone, please tell me something about the position of cameras : 1. In a tower (office, commercial, residental...), what areas required close-up view? what areas required general view? 2. In common type of cameras, what type of lens are used (2.9, 4, 6mm...)? 3. In general view, how much is the distance from camera to the scene? Thank you very much!!!