Conventional ultra-short-throw lenses demand accurate, time-consuming projector installation positioning with no margin for error. The ET-DLE020’s optical zoom, however, provides an installation margin of ±45 mm (±1.77˝) and easy image adjustment at a throw-ratio of 0.280:1, all with zero image offset. Combines with Panasonic laser projectors*1 to support Wide-range Vertical and Horizontal Lens-Shift, more than doubling movable shift area of comparable lenses, increasing installation flexibility, and expediting setup. F value: 2.0 Focal distance (f): 4.1-4.4 mm (5/32-11/64 inches) Throw ratio: 0.280-0.299:1 for PT-RCQ10/RCQ80/RZ990/RZ890/RZ790/RZ690/RZ120/ RZ970/RZ870/RZ770/RZ660 (16:10 aspect ratio) 0.294-0.314:1 for PT-RW930/RW730/RW620 (16:10 aspect ratio) 0.290-0.309:1 for PT-RX110 (4:3 aspect) Dimensions: (W × H × D): 170 × 170 × 391 mm (6-11/16 × 6-11/16 × 15-13/32 inches) Weight: Approximately 3.2 kg* (7.05 lbs*)