WK181 Projector Lens 0.46:1 for 1 Winmate Engineering Model, e.g. C-4K1200

The WK181 is a short-throw lens for the 0.65/0.66/0.67 panel group (Winmate), with a 0.46:1 throw ratio and lens shift. It supports 1 projector model from 1 model series. This article presents the lens specifications, installation distance, model compatibility list, and replacement considerations in one place.

1. Lens Specifications

Lens shift is this lens's key differentiator. The horizontal shift range of 85.2% and vertical shift range of 39.6% allow the projector to be installed off the screen centerline and the image repositioned using lens shift without requiring keystone correction. Keystone correction comes at a cost—at every correction step, some effective pixels are lost and text edges become blurred. In engineering installations, never use keystone correction when lens shift can solve the issue; this is the non-negotiable standard for image quality.

2. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of installation distance to image width. This lens has a fixed focal length (0.46:1), so installation distance varies linearly with image size, with no adjustment margin. Accurate measurements are therefore essential before installation.

These figures represent the clear distance from the front surface of the lens to the screen and do not account for ventilation or cable connection space behind the projector. Values are calculated for a 16:10 image; actual distances are subject to on-site measurements and the manual.

3. Compatible Projector Models (1 Model, Winmate)

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

Common Characteristics of These Models

The factory standard lens throw ratio for this model is generally listed as Depends on the lens. The 0.46:1 ratio featured in this article effectively adjusts the focal-length range, allowing the same projection distance to produce a different image size—this is the direct reason for replacing the lens. Full lens-shift capability is also retained, so the image can still be aligned after the focal-length adjustment.

4. Three Checks Before Replacement

• The panel and resolution must match. This model is compatible with a 0.67-inch panel. Projectors with a different panel size or resolution will vary somewhat in projection performance, so the safest approach is to verify the specifications against the nameplate on the projector before installation.
• Interface and locking mechanism. Interfaces are generally interchangeable within the same platform generation, but the positions of the locking clips vary between generations. If the image appears skewed or the edges are misaligned after installation, the locking mechanism usually has not fully engaged; this is typically not an issue with the lens itself.
• Account for lens-shift margin in the installation. The shift range provides some installation flexibility, but edge image quality declines when it is pushed to the limit. We recommend limiting actual use to 70% of the specified values.

For models not on the list, the safest way to confirm compatibility is to send us photos of the projector's nameplate and original lens—interfaces are often shared across the same platform generation, but ordering based on a similar model name is not worth the risk.