kuocyj 0 Posted April 2, 2007 What's VC lens and DC lens? what's difference between these two types lens? Thank you so much for your help. Share this post Link to post Share on other sites
survtech 0 Posted April 2, 2007 The difference is what signal the lens requires for the iris control. Video auto-iris lenses sample the video signal from the camera and convert it to a DC signal in the lens to adjust the iris accordingly. With DC auto-iris lenses, the camera has the circuitry that converts the video signal to a DC voltage that the lens uses to adjust the iris. DC auto-iris lenses are simpler (and therefore cheaper). Most modern cameras use DC auto-iris lenses. Some cameras can use either and will have a switch to select the type of A-I lens. Share this post Link to post Share on other sites
