LC013 1.5–3:1 Projector Lens for 4 Christie Models: C-WU1200L, C-WU1500L, C-WU730L, C-WU700L

LC013 is a medium-to-long-throw lens for the 0.65/0.66/0.67 panel group (Christie), with a 1.5–3:1 throw ratio and lens shift. It is compatible with 4 models across 2 model series. This article presents the lens specifications, installation distances, model compatibility list, and replacement considerations in one place.

1. Lens Specifications

Lens shift capability is the key differentiator of this lens. The horizontal shift range of +64 %, -44 % and the 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 keystone correction. Keystone correction comes at a cost—each adjustment step sacrifices some effective pixels and softens text edges. In professional installations, always use lens shift rather than keystone correction when possible; this is the baseline for image quality.

2. Converting Throw Ratio to Installation Distance

The throw ratio is the ratio of installation distance to image width. This is a zoom lens (1.5–3:1), so a given image size corresponds to a range of installation distances, and the lens can focus at any point within that range.

The distances above are clear distances from the front lens surface to the screen and do not include space for rear chassis ventilation or cable connections. They are calculated for a 16:10 aspect ratio; actual values are subject to on-site measurement and the manual.

Image quality differs at both ends of the zoom range: the image is brighter with slightly softer edges near the near end, while the edges are sharper and brightness slightly lower near the far end. If space permits, the middle of the range is recommended. After installation, find the sharpest setting on the focus ring first, then fine-tune the lens shift—adjusting both variables at once makes precise alignment difficult.

3. Compatible Models (4 Christie Models)

The table below is ordered from newest to oldest by model production date and lists 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 factory standard lens (upper limit ÷ lower limit of the factory 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 4 models mostly have throw ratios clustered around 1.22-1.52：1. The 1.5–3:1 model featured here effectively changes 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 aligned after the focal range is adjusted.

4. Three Checks Before Replacement

• The panel and resolution must match. This model is designed for a 0.67-inch panel. Projectors with a different panel size or resolution will show some variation in projection performance, so the safest approach is to verify the nameplate on the chassis before installation.
• Interfaces and locking mechanism. Interfaces are generally compatible across platforms of the same generation, but the position of the locking latch varies by generation. If the image is skewed or the edges appear soft after installation, the latch is usually not fully engaged; this is generally not a lens fault.
• Account for shift margin during installation. The shift range provides installation flexibility, but edge image quality declines when the shift is pushed to its limits. We recommend keeping actual use within 70% of the rated values.

For models outside the compatibility list, the safest option is to send us photos of the chassis nameplate and the original lens for verification—platforms of the same generation often share interfaces, but the risk of placing an order based on a similar model designation is not worth taking.