I bought the cameras through dvrusa.com. They are listed as dt-5600F on their website. They have:
AGC, Auto-Iris, AWB, BLC as well as auto filter change. They work great in most applications day and night... but when they are pointing towards anything with lots of leaves or foliage... the IR light reflects back and blinds the camera. The camera that I have pointed into the back yard allows me to see very clearly in total darkness (at least 100'). But the cameras in the side yards are closer to trees and they get the IR reflection.