Viewsonic PJD6221, 2900 ANSI lumens, DLP, XGA (1024x768), 3000:1, 30 - 300", 1.2/10 Viewsonic PJD6221. Projector brightness: 2900 ANSI lumens, Projection technology: DLP, Projector native resolution: XGA (1024x768). Light source type: Lamp, Service life of light source: 4000 h, Lamp power: 180 W. Focus: Manual, Focal length range: 18.36 - 22.02 mm, Digital zoom: 1.2x. Analog signal format system: SECAM. Serial interface type: RS-232 https://gcn.com/Articles/2010/05/17/Review-Portable-Projectors.aspx?Page=8 We were impressed with the PJD6221 because of its lack of flaws and generally good performance in all areas. Had the only price been the $999 retail one, we would probably point to others here for our recommendations. However, the.. https://www.projectorcentral.com/ViewSonic_PJD6221_classroom_projector_reviews.htm The Viewsonic PJD6221 at 2700 lumens is a bright portable projector appropriate for classrooms and conference rooms alike. For educators, it represents a tremendous bargain as they can buy this DLP-based projector for just over $600.... If you're looking for an excellent data projector, and you're willing to adjust video settings a bit, the PJD6221 is a solid candidate. It's relatively inexpensive, and a real bargain if you are intending to use it as a classroom projector. Fa...