Q: Why do you not see so much of the room with the camera?
A: The IN-5907 HD is designed for installation at a greater distance from the object (15-25m) and has therefore installed a lens with a smaller viewing angle. With a wide-angle lens, people on such distances are displayed too small and faces may no longer be recognizable.
The camera model IN-5905 HD, which has a double-view lens, is more suitable for use over shorter distances. A lens with the same viewing angle is available as an option but also for the IN-5907 HD:
IN-9008 Full HD Lense Adjustment
IN-5905 HD Lense Adjustment