Another factor to consider with an outdoor camera using a PIR sensor, as mentioned earlier in this thread, is the need of giving careful attention to the specs of the PIR sensor itself. Some outdoor cameras that already have PIR sensors use rather mediocre sensors i.e. very limited range and a limited angle of detection. I want to be able to put my camera on the corner of my house and know that motion can be detected within at least a 270 degree or more angle of detection and maybe 50-100 feet away for the PIR sensor itself. Perhaps this is a bit of a reach but the PIR sensor’s detection capabilities will be an important decision factor for me.