sdmoore68 0 Posted April 13, 2015 I have a Night Owl Poseidon-85 installed and operating with 8 cameras. I tried to upgrade my cameras by installing a Swann Pro-T850 camera. The video did not appear so I reconnected the old camera back. I intend to return the camera to best buy. I need to gain knowledge on why this did not work. Should I only buy night owl cameras or will other cameras work? Share this post Link to post Share on other sites