Type: Zoom lens, Special Functions: Zoom, Intended For: Projector, Focal Length: 20.4 mm - 27.6 mm, Lens Aperture: F/1.8-2.3, Optical Zoom: 1.4 x, Throw Ratio: 1.3-1.7:1, Length: 7.7 in, Diameter: 4.6 in, Weight: 2.65 lbs, Warranty: 01 Year Limited Warranty The Panasonic ET-ELW20 is a lens that makes it possible to vary the projection distance, by change of focal point. The Panasonic ETELW20 lens has a minimum focal length of 20.40mm and a maximum length of 27.60mm and 1.3x optical zoom.