The NEC NP12ZL 1.19-1.56:1 Zoom Lens is a manual 1.3x zoom lens. It is compatible with the NEC NP-PA600X, NP-PA500X, NP-PA550W, NP-PA500U, NP-PA500X-13ZL, NP-PA500U-13ZL, NP-PA550W-13ZL and the NP-PA600X-13ZL projectors. The lens is easily installed by end users and doesn't require any special tools.1.18 - 1.54:1 Manual Zoom Lens (lens shift) for the NP-PA521U/PA571W/PA621X, NP-PA622U/PA672W/PA722X, NP-PA653U/PA803U/PA853W/PA903X, NP-PA804UL-B/PA804UL-W and NP-PA1004UL-B/PA1004UL-W projectors