5 Conventional Cameras: To cover this lobby with conventional cameras, you'd need (3) 60º fixed cameras plus (2) PTZs. You end up with a hodgepodge of images that are difficult to make sense of.
One D7-180 Camera:
To cover this lobby with the Scallop Imaging cameras, you'd need only one! And you'd get an easy-to-understand full 180º view plus up to (4) separate detail windows.