Christie 140-143109-XX GS Zoom ST Lens for DWU1100-GS DWU1400-GS DWU880-GS Black DWU880-GS White

Christie OEM Lens 140-143109-XX GS Zoom is an OEM optical accessory for Christie engineering projectors and features a short throw (Short Throw) with a throw ratio of 0.65-0.75:1. The factory compatibility list covers 4 models; before installation, simply verify the projector model and panel size—there is no need to make do with adapter rings. The value of an OEM lens lies not in the extra rows of figures in its specification sheet, but in the fact that it is calibrated at the factory to the optical path and mount of that projector series: once installed, the image circle, edge illumination, and focus travel all match the design values, so there is no need to use keystone correction to compensate for image quality.

I. Lens Specifications

The above specifications are subject to the original manufacturer's specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please verify them with us based on your projector model; ordering based solely on a similar model carries the risk that the lens will not fit.

II. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of the installation distance to the image width. This OEM lens is a zoom lens (0.65-0.75:1), so a given image size corresponds to a range of distances, and it can focus anywhere within that range during installation.

These figures represent the clear distance from the front of the lens to the screen and do not include clearance for rear cooling and cable connections. Calculated for a 16:10 image, actual figures should be confirmed by on-site measurement and the manufacturer's manual.

Image quality varies between the two ends of the zoom range: at the short-throw end, the image is brighter and the edges are slightly softer; at the long-throw end, the edges are sharper and the brightness is slightly lower. Where venue conditions permit, the middle of the range is recommended. After installation, first find the sharpest position using the focus ring, then fine-tune the lens shift.

III. Compatible Models (4 Models)

The table below is taken from the factory compatibility list. Brightness and resolution are populated from the model database; entries that cannot be obtained are marked as "—" and are not estimated.

For models outside the list, send us photos of the projector nameplate and the existing lens to verify compatibility—platforms of the same generation often share a mount, but ordering based on model similarity is not worth the risk.

Throw Ratios by Model Series

The nominal throw ratio differs among the series listed below even when the same 140-143109-XX GS Zoom is installed, so use the value for the series of the actual projector when selecting a lens.

IV. Three Checks Before Replacement

• Confirm the projector chipset and resolution. OEM lenses are designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the panel fully, resulting in vignetting or edge light loss after installation.
• Calculate the installation distance first. This lens has a nominal throw ratio of 0.65-0.75:1. Use the table in Section II to calculate the distance for your venue; fixed-focus lenses offer no margin, and zoom lenses also require 10–20 cm of clearance at both ends.
• Verify the mount and locking mechanism. OEM lenses are calibrated to the mount of the applicable projector series and must audibly lock into place after installation. A skewed image or soft edges are usually caused by the lens not being fully locked, rather than by a fault in the lens itself.

If you are unsure, send us one photo of the projector nameplate and one of the nameplate on the existing lens; verification against the actual hardware is the safest approach.