Dell 4320 Network DLP Projector, 4300 ANSI Lumens WXGA HDMI 3D Outstanding color and clarity: Bring your presentations to life with vibrant color, clear images and stereo sound Versatile connectivity: Make your audience a part of the presentation with broad multi-user functionality.. Advanced technology:Make good presentations great with exceptional image quality with DLP Technology and Brilliant Color Technology. Brightness: 4300 ANSI Lumens10 (Max.) Projection Lens:F-Stop: F/2.4~2.66 Focal length, f = 18.2~21.8mm