This lens from Christie is a top product here at AValive. Each lens in the M Series suite of lenses includes the new true Intelligent Lens System (ILS). The ILS is incredibly advanced and automatically recognizes and calibrates a lens when it is installed. Stepped motor based encoding ensures that motor drift does not occur, which is a typical problem associated with DC encoded motors. This feature allows you to have an accurate and repeatable recall of all lens offset, zoom, and focus positions. When used with Christie M Series HD products, this ILS zoom lens has a 1.8-2.6:1 throw ratio. If used with any Christie M Series SXGA+ products, the ILS zoom lens will provide a 2.0-2.8:1 throw ratio. This device is compatible with a variety of Christie products. As always, AValive is your source for Christie lens, and provides you with superior pre- and post-sale service.