WD48B Projector Lens 0.35:1 for M8, MU9, W10 & W9 Engineering Projectors

WD48B is a short-throw lens for the 0.65/0.66/0.67 panel group (full-color display), with a throw ratio of 0.35:1. It is compatible with 4 projector models across 2 model series. This guide presents the lens specifications, installation distance, model compatibility list, and replacement considerations in one place.

1. Lens Specifications

2. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of installation distance to image width. This lens has a fixed focus (0.35:1), so the installation distance varies linearly with image size and offers no zoom adjustment. Accurate measurements are essential before installation.

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

3. Compatible Models (4 Models, Full-Color Display)

The table below is sorted from newest to oldest by model production date and lists each model's resolution, brightness, and zoom ratio for the factory-supplied lens, making it easy to identify the right option for project requirements.

The zoom ratio is the zoom factor of the model's factory-supplied standard lens (upper ÷ lower limits of its factory throw-ratio range), not the zoom range of the lens featured in this article.

Common Features of These Models

The factory-supplied standard lenses for these 4 models generally have throw ratios clustered around 1.22-1.52：1. The 0.35:1 model in this article effectively changes the focal length, allowing the same projection distance to produce a different image size—the direct reason for replacing the lens. It also retains full lens-shift capability, so the image can still be aligned after adjusting the focal length.

4. Three Things to Confirm Before Replacement

• Match the panel and resolution. This model is compatible with 0.67 inch panels. Projectors with a different panel size or resolution may show differences in projection performance, so checking the projector nameplate before installation is the safest approach.
• Check the interface and locking mechanism. Interfaces are generally compatible within the same platform generation, but locking latch positions vary between generations. If the image is skewed or the edges appear unclear after installation, the locking mechanism is usually not fully engaged; this is not an issue with the lens itself.
• A fixed-focus lens has no zoom adjustment. The image size can only be changed by moving the projector. The site dimensions must be measured accurately in advance, with an extra 10–20 cm beyond the endpoints.

For models not included in the list, the safest approach is to send us the projector nameplate and photos of the original lens for verification. Models from the same platform generation often share interfaces, but the risk of ordering based solely on a similar model designation is not worth taking.