LC014 1.5–3:1 Projector Lens for 3 Christie Models: DWU1400-GS, DWU1100-GS, DWU880-GS

LC014 is a medium-to-long-throw lens for 0.65/0.66/0.67 panel sizes (Christie), with a 1.5–3:1 throw ratio and lens shift. It is compatible with 3 models across 1 model series. This article consolidates the lens specifications, installation distances, model compatibility list, and replacement considerations.

1. Lens Specifications

Lens shift capability is the key differentiator of this lens. Its horizontal shift range of +64 %, -44 % and vertical shift range of +34 %, -27 % allow the projector to be installed off the screen’s central axis and the image to be repositioned using lens shift without relying on keystone correction. Keystone correction comes at a cost—each correction step sacrifices some effective pixels and softens text edges. In professional installations, lens shift should always be used instead of keystone correction whenever possible, as this is essential for image quality.

2. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of installation distance to image width. This zoom lens (1.5–3:1) covers a range of distances for each image size and can focus at any distance within the corresponding range.

These figures represent the clear distance from the front of the lens to the screen and do not account for rear housing ventilation or cable-management space. They are calculated for a 16:10 image; actual values are subject to on-site measurements and the manual.

Image quality differs at the two ends of the zoom range: near the short-throw end, the image is brighter and the edges are slightly softer; near the long-throw end, the edges are sharper and brightness decreases slightly. Where the installation environment allows, the middle of the range is recommended. After installation, first find the sharpest position using the focus ring, then fine-tune the lens shift—adjusting both variables at once makes precise alignment difficult.

3. Compatible Projector Models (3 Models, Christie)

The table below is ordered by model production date, from newest to oldest, and lists each model’s resolution, brightness, and original lens zoom ratio for quick selection according to project requirements.

The zoom ratio is the zoom factor of the model’s original standard lens (the upper limit of the original throw-ratio range ÷ the lower limit), not the zoom range of the lens featured in this article.

Common Features of These Models

The original standard lenses for the 3 models generally have throw ratios concentrated around 1.22-1.52:1. The 1.5–3:1 range of the model featured here effectively adjusts the focal range, allowing different image sizes at the same projection distance—this is the direct reason for replacing the lens. It also retains full lens shift capability, so the image can still be accurately aligned after adjusting the zoom range.

4. Three Checks Before Replacement

• Confirm the panel and resolution. This model is designed for a 0.67-inch panel. Projectors with different panel sizes or resolutions may display somewhat different results, so the safest approach is to verify the specifications against the projector’s nameplate before installation.
• Check the interface and locking mechanism. Interfaces are generally compatible within the same platform generation, but the position of the locking latch may differ between generations. If the image appears skewed or the edges are not sharp after installation, the locking mechanism is usually not fully engaged rather than the lens itself being faulty.
• Account for lens-shift margin during installation. The shift range provides installation flexibility, but image quality at the edges degrades when the lens is shifted to its limits. For actual use, keep shifts within 70% of the specified values.

For the safest verification of compatibility with models not listed, send us a photo of the projector’s nameplate and original lens—models on the same platform generation often share the same interface, but ordering based on a similar model name alone carries unnecessary risk.