Christie 118-100112-01 ILS1 Zoom Standard Throw Projector Lens

Christie Original Lens 118-100112-01 ILS1 Zoom is a genuine optical accessory for Christie large-venue projectors. It is a standard-throw lens with a throw ratio of 1.40-1.80:1. The original compatibility list covers 37 projector models, so you can verify fit by chassis model and panel size before installation—no adapter rings needed. The value of an original lens isn't a few extra rows in a spec sheet; it's that it is calibrated at the factory to the optical path and mount of that chassis series. Once mounted, the image circle, edge illumination, and focus travel all match design values, so you don't need keystone correction to compensate for image quality.

1. Lens Specifications

The specifications above are subject to the original manufacturer's data. For mechanical dimensions, flange focal distance, and mount type not shown in the spec table, please verify with us against your chassis model. Ordering based on a similar model number carries the risk of incompatibility.

2. Converting Throw Ratio to Installation Distance

Throw ratio is the ratio of installation distance to image width. This original lens is a zoom lens (1.40-1.80:1), so a given image size corresponds to a range of distances; the image will focus anywhere within that range.

The values above are the clear distance from the lens face to the screen, excluding rear ventilation and cabling space behind the projector. Calculated for a 16:10 aspect ratio; actual values are subject to on-site measurement and the original manufacturer's manual.

Image quality differs at the two ends of the zoom range: toward the near end the image is brighter with slightly softer edges; toward the far end the edges are sharper with slightly reduced brightness. If the venue allows, aim for the middle of the range. After installation, first find the sharpest point on the focus ring, then fine-tune the shift.

3. Compatible Models (37)

The table below is taken from the original compatibility list; brightness and resolution are filled in from the model database. Where data is unavailable, "—" is shown rather than an estimate.

To check whether a model not on the list is compatible, send us a photo of the chassis nameplate and the existing lens for verification—same-generation platforms often share a mount, but ordering based on a similar model number isn't worth the risk.

Throw Ratios Across Model Series

The same 118-100112-01 ILS1 Zoom has different nominal throw ratios when mounted on the following series, so selection should use the value for the actual chassis series.

4. Three Things to Confirm Before Replacement

• Confirm the chassis chip and resolution. Original lenses are designed for specific panel sizes. With a different panel specification, the image circle cannot cover the panel, resulting in vignetting or edge light falloff after installation.
• Calculate the installation distance first. This lens has a nominal throw ratio of 1.40-1.80:1; apply it to your venue dimensions using the table in Section 2. Fixed lenses have no margin, and even with a zoom lens, leave 10–20 cm at both ends.
• Check the mount and locking. Original lenses are calibrated to the chassis mount of that series; after installation you must hear the lock engage. A skewed image or soft edges are usually caused by incomplete locking, not by the lens itself.

If unsure, take a photo of the chassis nameplate and the existing lens nameplate and send them to us—verifying against the actual hardware is the safest approach.