Christie 140-166104-XX Short Zoom Lens: Korus 4K1000-KS / Korus 4K1400-KS Compatibility

Christie Original Lens 140-166104-XX Short Zoom is an OEM optical accessory for Christie professional projectors. It is a short-throw lens (Short Throw) with a throw ratio of 0.50-0.65:1. The OEM compatibility list covers 2 projector models. Before installation, simply verify the projector model and panel size; no adapter ring workaround is needed. The value of an OEM lens lies not merely in a few additional specifications, 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 meet their design specifications, eliminating the need to use keystone correction to compensate for image quality.

I. Lens Specifications

Brand	Christie (Christie)
Lens Model	140-166104-XX Short Zoom
Throw Ratio	0.50-0.65:1
Product Type	Short Throw (Short Throw)
Compatible Models	2 projectors
Warranty	12 months; damage not caused by the user is eligible for after-sales service, based on the shipment date shown on the invoice

The above specifications are subject to the OEM specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please check with us using the exact projector model. Ordering solely on the basis of a similar model risks a lens that will not fit.

II. Calculating Installation Distance from the Throw Ratio

The throw ratio is the ratio of the installation distance to the image width. This OEM lens is a zoom lens (0.50-0.65:1). A given image size corresponds to a range of distances, and focus can be achieved at any distance within that range during installation.

Image Size	Image Width	Required Installation Distance
100 inches	2.15 m	Approx. 1.07 – 1.40 m
120 inches	2.58 m	Approx. 1.29 – 1.68 m
150 inches	3.22 m	Approx. 1.61 – 2.10 m
200 inches	4.30 m	Approx. 2.15 – 2.79 m

The distances above are clear distances from the front face of the lens to the screen and do not include space for rear cooling or cable connections. They are calculated for a 16:10 image format; actual values should be verified on site and according to the OEM manual.

Image performance differs at the two ends of the zoom range: toward the short end, the image is brighter and the edges are slightly softer; toward the long end, the edges are sharper and brightness is slightly lower. Where site conditions allow, use the middle of the range. After installation, find the sharpest setting on the focus ring, then fine-tune the lens shift.

III. Compatible Models (2 Projectors)

The following table is taken from the OEM compatibility list. Brightness and resolution are populated from the projector model database; unavailable values are shown as “—” and have not been estimated.

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

To check compatibility with a model not on the list, send us photos of the projector nameplate and the current lens. Platforms from the same generation often share the same mount, but ordering based only on a similar model number carries an unnecessary compatibility risk.

Throw Ratios by Model Series

The nominal throw ratio varies by projector series when the same 140-166104-XX Short Zoom lens is installed. Select the ratio based on the series of the actual projector.

Model Series	Throw Ratio
—	0.50-0.65:1

IV. Three Checks Before Replacement

• Confirm the projector imaging chip and resolution.OEM lenses are designed for a specific panel size. When the panel specifications differ, the image circle cannot cover the image area, resulting in vignetting or edge light loss after installation.
• Calculate the installation distance first.This lens has a rated throw ratio of 0.50-0.65:1. 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 needs 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 you must hear the lock engage after installation. A skewed image or soft edges are 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 photo of the nameplate on the current lens, then send them to us. Verification against the actual equipment is the safest approach.