I currently use a regular webcam in my observatory as a security camera. I have an alarm system that will turn on the lights if an intruder enters, so it serves the security function just fine. However, I would like to be able to use a camera to monitor the equipment remotely during a photo session.
Does anyone have recommendations for a passive IR USB cam that has reasonable night vision without emitting any IR light? Maximum range inside the dome is 14 feet corner-to-corner. Would it do any good to remove a filter from a visible-light webcam?