Christie 140-142108-XX Short Fixed UST Lens Guide: DWU23-HS Compatibility

Christie Original Lens 140-142108-XX Short Fixed is an original optical accessory for Christie engineering projectors. It is an ultra short throw (Ultra Short Throw) lens with a throw ratio of 0.38:1. The manufacturer's compatibility list covers 1 model, so simply verify the projector model and panel size before installation—no adapter ring workaround is needed. The value of an original lens lies not in the extra rows in the specification table, but in the fact that it is factory-calibrated to the optical path and mount of that model series. Once installed, the image circle, edge illumination, and focusing travel all match their design values, eliminating the need to use keystone correction to compensate for image quality.

1. Lens Specifications

The above specifications are subject to the manufacturer's original specifications. For mechanical dimensions, flange distance, and mount type not listed in the table, please contact us with the projector model for verification. Ordering solely on the basis of a similar model carries the risk that the lens will not fit.

2. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of the installation distance to the image width. This original lens is a fixed-focus lens (0.38:1). Installation distance varies linearly with image size and offers no adjustment margin, so accurate measurements are essential before installation.

The above figures represent the clear distance from the front surface of the lens to the screen and do not include cooling or cable-connection space at the rear of the projector. They are calculated for a 16:10 image; actual values must be confirmed through on-site measurement and in accordance with the manufacturer's manual.

3. Compatible Projector Models (1 Unit)

The table below is taken from the manufacturer's compatibility list. Brightness and resolution are populated from the model database; “—” is shown where the data is unavailable, with no values estimated.

For models not on the list, send us the projector nameplate and a photo of the existing lens for verification. Platforms from the same generation often share the same mount, but the risks of ordering based on a similar model outweigh the potential savings.

Throw Ratios for Different Model Series

When the same 140-142108-XX Short Fixed lens is used with the series listed below, the nominal throw ratio varies. Select the value based on the series of the actual projector.

4. Three Checks Before Replacement

• Confirm the projector's imaging chip and resolution.Original lenses are designed for specific panel sizes. If the panel specifications differ, the image circle cannot cover the full image area, resulting in vignetting or edge light loss after installation.
• Calculate the installation distance first.This lens has a nominal throw ratio of 0.38:1; use the table in Section 2 to calculate the distance for your installation site. A fixed-focus lens offers no adjustment margin, and even a zoom lens requires 10–20 cm of extra clearance at both ends.
• Verify the mount and locking mechanism.The original lens is designed and calibrated for the mount used on that model series, and you must hear it click into the locked position after installation. A skewed image or soft edges is usually caused by incomplete locking, rather than a problem with the lens itself.

If you are unsure, take one photo of the projector nameplate and one of the existing lens nameplate and send them to us. Verification against the physical units is the most reliable approach.