Christie 140-164102-XX Ultra Short Zoom Lens for Korus 4K1000-KS and Korus 4K1400-KS

Christie Genuine Lens 140-164102-XX Ultra Short Zoom is a factory-supplied ultra-short-throw (Ultra Short Throw) optical accessory for Christie engineering projectors, with a throw ratio of 0.34-0.37:1. The factory compatibility list covers 2 models. Before installation, simply verify the projector model and panel size without resorting to an adapter ring. Rather than adding a few lines to the specification table, its value lies in factory calibration to the optical path and mount of projectors in that series: the image circle, edge illumination, and focus travel all meet the design specifications, eliminating the need to use keystone correction to compensate for image quality.

1. Lens Specifications

Brand	Christie (Christie)
Lens Model	140-164102-XX Ultra Short Zoom
Throw Ratio	0.34-0.37:1
Product Type	Ultra Short Throw
Compatible Models	2 models
Warranty	12 months; damage not caused by the user is eligible for after-sales service, subject to the date shown on the shipping documents

The above specifications are subject to the manufacturer's official specifications. For mechanical dimensions, flange distance, and mount type not listed in the specifications table, please contact us with the projector model. Placing an order based solely on 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 installation distance to image width. This genuine lens is a zoom lens (0.34-0.37:1), so each image size corresponds to a range of installation distances, and it can focus anywhere within that range.

Image Size	Image Width	Required Installation Distance
100 inches	2.15 m	Approx. 0.73 – 0.80 m
120 inches	2.58 m	Approx. 0.88 – 0.95 m
150 inches	3.22 m	Approx. 1.10 – 1.19 m
200 inches	4.30 m	Approx. 1.46 – 1.59 m

The above figures represent the clear distance from the front face of the lens to the screen, excluding space for rear chassis cooling and cable connections. They are calculated for a 16:10 image; actual distances should be verified on site and according to the manufacturer's manual.

Image quality differs at the two ends of the zoom range: the image is brighter with slightly softer edges at the near end, while the edges are sharper with slightly reduced brightness at the far end. If space allows, use the middle of the range. After installation, first find the sharpest position using the focus ring, then fine-tune the lens shift.

3. Compatible Models (2 Models)

The following table is taken from the factory compatibility list. Brightness and resolution are populated from the model database; where data is unavailable, “—” is shown rather than estimated.

Model	Brightness	Resolution
Korus 4K1000-KS	—	—
Korus 4K1400-KS	—	—

To check whether a model not on the list is compatible, send us photos of the projector nameplate and the existing lens. Platforms from the same generation often share the same mount, but ordering based on model similarity alone is not worth the risk.

Throw Ratios by Model Series

The stated throw ratio differs by series when the same 140-164102-XX Ultra Short Zoom lens is used on the following series. Select the value based on the actual projector series.

Model Series	Throw Ratio
—	0.34-0.37:1

4. Three Checks Before Replacement

• Check the projector chip and resolution. The genuine lens is designed for a specific panel size. If the panel specifications differ, the image circle cannot provide full coverage, resulting in vignetting or light loss at the edges.
• Calculate the installation distance first. Using the rated throw ratio of 0.34-0.37:1, apply the table in Section 2 to the dimensions of your installation site. A fixed-focal-length lens offers no adjustment margin, and even a zoom lens requires 10–20 cm of margin at both ends.
• Verify the mount and locking mechanism. The genuine lens is calibrated to the mount on projectors in that series. After installation, you must hear the lock fully engage. A skewed image or soft edges are usually caused by an incompletely engaged lock, not by the lens itself.

If you are unsure, take one photo each of the projector nameplate and the existing lens nameplate and send them to us. Verification against the actual hardware is the safest approach.