The ability to pan, tilt, and zoom in on a specific area, making it easier to monitor and capture high-quality footage at remote locations. The question is, are these NDI cameras really worth the investment?

1. Wide Coverage Area - One of the most significant advantages of NDI PTZ cameras is the wide area coverage they provide. With the ability to pan and tilt, these NDI cameras can cover a much larger area than a standard fixed-lens camera.
    
2. Without any distance limit we know, the standard PTZ camera, let us take the USB PTZ camera as an example: If the distance between the main control PC and camera is very far, which is over 20m, the longer USB cable will influence the image quality and the video transfer speed; since then the NDI camera is needed for large conference rooms or churches, the user can control the camera via IP web page, pan, tilt, zoom in and zoom out these basic functions are available for NDI cameras.
    
3. Zoom Capabilities - Another benefit of NDI PTZ cameras is their zoom capabilities, which enable the user to capture details over long distances. This feature makes NDI PTZ cameras an ideal option for security applications where a subject's identity is of paramount importance.
    
4.  Flexible Deployment - As NDI PTZ cameras do not require many cameras to cover a large area, they offer flexible deployment opportunities while saving on installation costs.

 However, one significant drawback of NDI PTZ cameras is their cost. They tend to be more expensive than regular fixed-lens cameras due to their advanced features. Additionally, NDI PTZ cameras require more maintenance since they have moving parts that may malfunction or need regular cleaning. They also have a more complex setup, requiring external power sources, mounts, and cabling to be installed.

 In conclusion, it can be said that NDI PTZ cameras are definitely worth considering in certain applications. Their ability to pan, tilt, and zoom makes them well-suited for monitoring large areas, which would be difficult to cover with fixed-lens cameras. Additionally, their remote control ability makes them the ideal choice for remote locations.