WE294 Projector Lens 0.5–0.6:1 for 3 Christie Models: DWU1400-GS, DWU1100-GS, DWU880-GS

WE294 is a short-throw lens for 0.65/0.66/0.67 panel sizes (Christie), featuring a 0.5–0.6:1 throw ratio and lens shift. It is compatible with 3 projector models across 1 model series. This article presents the lens specifications, installation distances, model compatibility list, and replacement considerations all in one place.

1. Lens Specifications

Lens-shift capability is the key differentiator of this lens. A shift range of ±35% horizontally and ±10% vertically allows the projector to be installed off the screen centerline and the image repositioned through lens shift without requiring keystone correction. Keystone correction comes at a cost—each adjustment reduces the effective pixel count and blurs text edges. In professional installations, never resort to keystone correction when lens shift can resolve the issue; this is the baseline for image quality.

2. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of installation distance to image width. This is a zoom lens (0.5–0.6:1), so the same image size corresponds to a range of installation distances, and the lens can be focused anywhere within that range.

These distances represent the clear distance from the front lens surface to the screen and do not include clearance for rear housing ventilation or cabling. The values are calculated for a 16:10 frame; actual distances should be verified on site and according to the manual.

Image quality varies at the two ends of the zoom range: toward the short-throw end, the image is brighter and the edges are slightly softer; toward the long-throw end, the edges are sharper and brightness decreases slightly. When the installation site allows, use the middle of the range. After installation, find the sharpest setting using the focus ring, then fine-tune the lens shift—adjusting both variables at the same time makes precise alignment difficult.

3. Compatible Models (3 Christie Models)

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

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

Common Characteristics of These Models

The factory-standard lenses for these 3 models generally have throw ratios within the 1.22-1.52：1 range. The 0.5–0.6:1 model featured here effectively changes the focal range, allowing different image sizes from the same projection distance—the direct reason for replacing the lens. It also retains full lens-shift capability, so the image can still be precisely aligned after the focal range is changed.

4. Three Checks Before Replacement

• Confirm the panel size and resolution. This model is compatible with 0.67-inch panels. Projectors with different panel sizes or resolutions may show differences in projection performance; checking the projector nameplate before installation is the most reliable approach.
• Check the interfaces and locking mechanism. Interfaces are generally compatible across platforms of the same generation, but locking-clip positions vary between generations. If the image appears skewed or the edges are soft after installation, the locking mechanism is usually not fully engaged rather than the lens itself being faulty.
• Factor lens-shift headroom into the installation. The shift range provides installation flexibility, but edge image quality declines when it is pushed to the limit. Actual use should be kept within 70% of the specified values.

For models outside the list, the safest approach is to send us the projector nameplate and a photo of the original lens for verification—platforms of the same generation often share interfaces, but ordering solely based on a similar model designation carries unnecessary risk.