Christie 140-165103-XX Zoom Standard Throw Lens for Korus 4K1000-KS and Korus 4K1400-KS

Christie Original Lens 140-165103-XX Zoom is an original optical accessory for Christie engineering projectors. It is a standard-throw (Standard Throw) lens with a 1.25-2.00:1 throw ratio. The manufacturer's compatibility list covers 2 models; before installation, simply verify the projector model and panel size—no need to make do with adapter rings. The value of an original lens lies not in the extra figures in its 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 focusing travel all meet the design values, with no need to compensate for image quality using keystone correction.

I. Lens Specifications

Brand	Christie（Christie）
Lens Model	140-165103-XX Zoom
Throw Ratio	1.25-2.00:1
Product Type	Standard Throw (Standard Throw)
Compatible Models	2 models
Warranty	12 months; damage not caused by the user is eligible for after-sales service, based on the date shown on the shipping document

The above specifications are subject to the manufacturer's specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please verify them with us based on the projector model, as ordering solely on the basis of 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 original lens is a zoom lens (1.25-2.00:1), so each image size corresponds to a range of installation distances, and the lens can focus at any point within that range during installation.

Image Size	Image Width	Required Installation Distance
100 inches	2.15 m	approx. 2.69 – 4.30 m
120 inches	2.58 m	approx. 3.22 – 5.16 m
150 inches	3.22 m	approx. 4.03 – 6.45 m
200 inches	4.30 m	approx. 5.38 – 8.60 m

The above distances are the clear distances from the front of the lens to the screen and do not include space for rear cooling and cable connections. These values are calculated for a 16:10 aspect ratio; actual installation should be verified through on-site measurement and the manufacturer's manual.

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

III. Compatible Projector Models (2 Models)

The following table is taken from the manufacturer's compatibility list. Brightness and resolution are populated from the model database; unavailable values are marked as 「—」 without speculation.

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

To determine whether a model outside the list is compatible, please send us a photo of the projector nameplate and the existing lens for verification. Platforms from the same generation often share the same mount, but ordering based solely on a similar model is not worth the risk.

Throw Ratios for Different Model Series

The nominal throw ratio varies by series when the same 140-165103-XX Zoom is installed on the following series. Select the value based on the series of the actual projector.

Model Series	Throw Ratio
—	1.25-2.00:1

IV. 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 will not cover the full image, resulting in vignetting or edge light loss after installation.
• Calculate the installation distance first. This lens has a nominal throw ratio of 1.25-2.00:1. Use the table in Section 2 to match the dimensions of your venue. Fixed-focus lenses offer no adjustment margin, and zoom lenses should also have 10–20 cm of allowance at both ends of the range.
• Verify the mount and locking mechanism. The original lens is calibrated to the mount of that projector series. You must hear the lock engage fully 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 current lens nameplate and send them to us. Verification against the physical equipment is the most reliable approach.