LS2ST4 ProjectorMultiple Lenses for Diverse ApplicationTo support optimal projector installation and performance in a wide range of environment five types of optical lenses ranging from short-throw to long-throw lens are available. The all-glass optical lenses* eliminate chromatic aberration and color flare for the utmost image quality. Users can maximize installation options and projection layout with a quick one-button release. Changing lenses is now simple and secure.*All lenses except LS2ST3 are all-glass optical lenses.