crow 0 Posted May 13, 2013 HI my friend has one of these dd427-x and another has the dd423-x pelco ptz cameras the 27x one lights up very dark areas automaticly and the 23x one doesnt ,they are both running default factory settings has the 27x one got some kind of chip that does some kind of fancy lightening trick? cheers Share this post Link to post Share on other sites