WK111 Projector Lens 0.651:1 for 11 Optoma Models

WK111 is a short-throw lens for 0.47/0.48-inch panels (Appotex), with a 0.651:1 throw ratio and lens shift. It is compatible with 11 models from one model series. This guide presents the lens specifications, installation distances, model compatibility list, and key replacement considerations in one place.

I. Lens Specifications

Lens-shift capability is the key differentiator of this lens. A horizontal shift range of 236.6% and a vertical shift range of 106.6% allow the projector to be installed off-center relative to the screen centerline while lens shift brings the image back into alignment without requiring keystone correction. Keystone correction comes at a cost—each level of correction reduces the effective pixel count and blurs text edges. In professional installations, lens shift should always be used instead of keystone correction whenever possible; this is the minimum standard for image quality.

II. Calculating Installation Distance from the Throw Ratio

The throw ratio is the ratio of the installation distance to the image width. This lens has a fixed focal length (0.651:1), so the installation distance varies linearly with the image size, with no adjustment margin. Accurate measurements are essential before installation.

These values represent the clear distance from the front surface of the lens to the screen and do not include space required for rear chassis ventilation and cable connections. They are calculated for a 16:10 image; actual values are subject to on-site measurements and the manual.

III. Compatible Models (11 Models, Appotex)

The table below is ordered by model production date, from newest to oldest. It includes each model's resolution, brightness, and original lens zoom ratio, making it easy to identify the right option for project requirements.

Common Characteristics of These Models

The throw ratios of the standard lenses supplied with these 11 models vary by model: Depends on the lens. The 0.651:1 ratio of the model discussed here represents an adjustment to the focal range, allowing a different image size from the same projection distance—which is the direct reason for replacing the lens. It also retains the full lens-shift capability, allowing the image to remain aligned after the focal range has been changed.

IV. Three Checks Before Replacement

• Confirm the panel and resolution match. This model is designed for 0.48-inch panels. Projectors with different panel sizes or resolutions may produce somewhat different projection results, so checking the chassis nameplate before installation is the safest approach.
• Check the interface and locking mechanism. Interfaces are generally compatible within the same platform generation, but the positions of the locking tabs differ between generations. If the image appears skewed or the edges look soft after installation, the lock usually has not fully engaged; this is generally not a problem with the lens itself.
• Account for lens-shift headroom in the installation. The shift range provides some installation flexibility, but edge image quality declines when the lens is pushed to its limits. Actual operation should therefore remain within 70% of the rated values.

For models outside the list, the safest option is to send us the chassis nameplate and a photo of the original lens for verification. Although models from the same platform generation often share interfaces, ordering based solely on a similar model designation is not worth the risk.