Christie 118-100110-03 ILS1 Fixed Short-Throw Lens: M 4K+15 RGB, M 4K+25 RGB, M 4K15 RGB, M 4K25 RGB

Christie Genuine Lens 118-100110-03 ILS1 Fixed is an OEM optical accessory for Christie professional projectors. It is a short-throw (Short Throw) lens with a throw ratio of 0.67:1. The OEM compatibility list covers 4 models. Before installation, simply verify the projector model and panel size; there is no need to improvise with adapter rings. The value of an OEM lens lies not in the additional figures in its specifications, but in the fact that it is factory-calibrated to the optical path and mount of the projector series. Once installed, the image circle, edge illumination, and focus travel all meet their design values, with no need to use keystone correction to compensate for image quality.

1. Lens Specifications

Brand	Christie (Christie)
Lens Model	118-100110-03 ILS1 Fixed
Throw Ratio	0.67:1
Product Type	Short-throw (Short Throw)
Compatible Models	4 Models
Warranty	12 months; after-sales service is available for damage not caused by the user, subject to the date on the shipping invoice

These specifications are subject to the OEM specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please contact us with the projector model for verification. Placing an order directly based 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 has a fixed focal length (0.67:1), so the installation distance varies linearly with image size, with no room for adjustment. Accurate measurements are essential before installation.

Image Size	Image Width	Required Installation Distance
100 inches	2.15 m	approx. 1.44 m
120 inches	2.58 m	approx. 1.73 m
150 inches	3.22 m	approx. 2.16 m
200 inches	4.30 m	approx. 2.88 m

These figures represent the clear distance from the front surface of the lens to the screen and do not include space behind the projector for cooling and cable connections. They are calculated for a 16:10 image; actual distances are subject to on-site measurements and the OEM manual.

3. Compatible Models (4 Models)

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

Model	Brightness	Resolution
M 4K+15 RGB	—	—
M 4K+25 RGB	—	—
M 4K15 RGB	—	—
M 4K25 RGB	—	—

To check whether a model outside the list can be used, send us photos of the projector nameplate and the existing lens. Platforms of the same generation often share the same mount, but the risk of ordering based on a similar model is not worth taking.

Throw Ratio by Model Series

The nominal throw ratio varies by series when the same 118-100110-03 ILS1 Fixed lens is installed on the series listed below, so select the value based on the actual projector series.

Model Series	Throw Ratio
—	0.67:1

4. Three Checks Before Replacement

• Confirm the projector chip and resolution. OEM lenses are designed for a specific panel size. If the panel specifications differ, the image circle cannot 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 0.67:1; use the table in Section 2 and apply it to the dimensions of your venue. This fixed-focal-length lens has no adjustment margin; even for a zoom lens, allow 10–20 cm at both ends.
• Verify the mount and locking mechanism. OEM lenses are calibrated to the mounts of projectors in the relevant series. After installation, you must hear the lens lock into place. Image skew or soft edges is usually caused by incomplete locking, not by the lens itself.

If you are unsure, take one photo of the projector nameplate and one of the current lens nameplate, then send them to us. Verification against the physical products is the safest approach.