WB372 Projector Lens 0.6–0.62:1 for Christie 4K1000-KS/4K1400-KS/4K2100-JS/4K1600-JS/DWU2400-JS

WB372 is a short-throw lens for 0.8-inch panels (Optoma, Christie), with a 0.6–0.62:1 throw ratio and lens shift. It is compatible with 8 projector models across 2 model series. This guide brings together the lens specifications, installation distance, model compatibility list, and replacement considerations.

I. Lens Specifications

Lens shift is the key differentiator of this lens. The ±12% horizontal and ±3.9% vertical shift ranges allow the projector to be installed off the screen’s central axis, with the image repositioned through lens shift rather than keystone correction. Keystone correction comes at a cost—each adjustment sacrifices some effective pixels and blurs text edges. In professional installations, always use lens shift instead of keystone correction whenever possible; this is the non-negotiable standard for image quality.

II. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of installation distance to image width. This lens has a zoom range of 0.6–0.62:1, so each image size corresponds to a range of distances, and it can focus anywhere within that range.

These figures represent the clear distance from the front surface of the lens to the screen and do not include rear-chassis clearance for cooling and cabling. Calculated for a 16:10 image; actual distances should be confirmed through on-site measurement and the manual.

Image quality varies between the two ends of the zoom range: near the close end, the image is brighter and the edges are slightly softer; near the long end, the edges are sharper and brightness decreases slightly. When venue conditions allow, the middle of the range is recommended. After installation, first find the sharpest setting on the focus ring, then fine-tune the lens shift—adjusting both variables at once makes precise alignment difficult.

III. Compatible Models (8 Models, Optoma and Christie)

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

Common Characteristics of These Models

The throw ratios of the original standard lenses across the 8 models vary widely and depend on the lens. The 0.6–0.62:1 ratio of the model featured here represents an adjustment to the focal range, allowing the same projection distance to produce different image sizes—this is the direct reason for replacing the lens. It also retains the full lens-shift capability, so the image can still be aligned after the focal range is changed.

IV. Three Checks Before Replacement

• The panel and resolution must match. This model is designed for a 0.8-inch panel. Projectors with a different panel size or resolution may show differences in projection performance; checking the projector’s nameplate before installation is the safest approach.
• Mounting interface and locking mechanism. Interfaces are generally compatible across platforms of the same generation, but the position of the locking latch differs by generation. If the image is skewed or the edges are not sharp after mounting, the lock usually has not fully engaged; this is rarely a problem with the lens itself.
• Account for lens-shift margin during installation. The shift range provides installation margin, but edge quality declines when the lens is pushed to its limit. For typical use, keep actual shift within 70% of the specified value.

For models outside the list, the safest option is to send us the projector nameplate and a photo of the original lens for verification. Platforms of the same generation often share the same interface, but the risk of ordering based only on a similar model designation is not worth taking.