The Christie 38-809051-51 is a medium-throw zoom lens designed for specific Christie LX series LCD projectors, including the LX41, LX650, and LX700. This lens provides a 1.8–2.4:1 throw ratio, meaning that for every foot of image width, the projector must be placed between 1.8 and 2.4 feet away from the screen. The 1.33× zoom ratio, combined with a variable focal length of 48.4–62.8mm, gives installers flexibility in positioning the projector to achieve the desired image size. With a fast f/1.8–2.1 aperture, the lens is capable of producing bright, vivid images, even in environments with some ambient light.

Its compact and robust design makes it a reliable choice for professional AV installations in various settings. It's especially useful for venues like conference rooms, boardrooms, trade shows, and home theaters where a versatile throw distance is needed without sacrificing image quality. The lens features Christie's bayonet mount system, ensuring a secure and easy attachment to compatible projectors.