WB373 Projector Lens 0.6–0.62:1 for Optoma MSV9137 MSV9143 CKL1100T CKL1300T ZK1120 ZK1320

WB373 is a short-throw lens for a 0.8-inch panel (Optoma), with a 0.6–0.62:1 throw ratio and lens shift. It is compatible with 6 projector models across 1 model series. This article brings together the lens specifications, installation distance, model compatibility list, and replacement considerations.

1. Lens Specifications

Lens shift is the key differentiator of this lens. Its ±12% horizontal and ±3.9% vertical shift range allows the projector to be installed off the screen centerline, with lens shift bringing the image back into alignment without the need for keystone correction. Keystone correction comes at a cost—each correction step sacrifices some effective pixels and can blur text edges. In professional installations, never use keystone correction when lens shift can resolve the issue; image quality is non-negotiable.

2. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of installation distance to image width. This lens is zoomable (0.6–0.62:1), so each image size corresponds to a range of distances, and the lens can be focused at any point within the relevant range during installation.

The distances above represent the clear distance from the lens front surface to the screen and do not allow for cooling space or cable connections at the rear of the projector. Values are calculated for a 16:10 image; confirm actual distances through on-site measurement and the manual.

Image quality differs at the two ends of the zoom range: at the short end, the image is brighter but the edges are slightly less crisp; at the long end, the edges are sharper but brightness is slightly lower. Where the venue allows, aim for the middle of the range. After installation, find the sharpest position on the focus ring first, then fine-tune the lens shift—adjusting both variables at the same time makes it difficult to pinpoint the optimum setting.

3. Compatible Projector Models (6 Models, Optoma)

The table below is ordered by model production date, from newest to oldest, and includes each model's resolution, brightness, and factory-installed lens zoom ratio, helping you quickly identify the right option for your project.

Common Features of These Models

The throw ratios of the factory-installed standard lenses for these 6 models vary from lens to lens and are generally listed as Depends on the lens. The 0.6–0.62:1 ratio of the WB373 lens effectively changes the focal range, allowing the same projection distance to produce different image sizes—this is the direct reason for replacing the lens—while retaining full lens-shift capability so the image can still be realigned after the focal range is adjusted.

4. Three Checks Before Replacement

• Confirm that the panel and resolution match. This model is compatible with a 0.8-inch panel. Projectors with a different panel size or resolution will show some variation in projection performance, so the safest approach is to check the nameplate on the projector before installation.
• Check the interfaces and locking mechanism. Interfaces are generally interchangeable within the same platform generation, but locking clip positions differ between generations. If the image appears skewed or the edges are not sharp after installation, the lock is usually not fully engaged rather than the lens itself being faulty.
• Allow for lens-shift margin in the installation. The shift range provides some installation flexibility, but image quality at the edges declines when it is pushed to the limit. In practice, actual use should remain within 70% of the rated values.

For compatibility with models not listed, it is safer to send us photos of the projector nameplate and original lens for verification. Platforms of the same generation often share interfaces, but the risks of ordering based only on a similar model designation are not worth taking.