HD83 Optoma May 6, 2013July 27, 2017 KC Wong HD83 Optoma Home Theater Projector 1600 ANSI Lumens. 50000:1 Contrast Ratio (Max). Native 1080p. FULL 3D 2 X HDMI 1.4a (3D Supported) 8.4KG. Download Brouchur