WD481 0.35:1 Projector Lens for Optoma ZU820 ZU920 ZU800 and 30 More Installation Projectors

WD481 is a short-throw lens for the 0.65/0.66/0.67-inch panel group (Optoma), with a 0.35:1 throw ratio. It is compatible with 33 models across 2 model series. This guide presents the lens specifications, installation distances, model compatibility list, and key replacement considerations in one place.

1. Lens Specifications

2. 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 (0.35:1), so the installation distance varies linearly with image size, with no zoom adjustment. Accurate measurements are essential before installation.

The distances above are clear distances from the front of the lens to the screen and do not include space at the rear of the chassis for ventilation and cabling. Figures are based on a 16:10 image; actual site measurements and the manual take precedence.

3. Compatible Models (33 Models, Optoma)

The table below is sorted from newest to oldest by model launch date. It includes each model’s resolution, brightness, and factory lens zoom ratio, making it easy to identify the right option for your project requirements.

The zoom ratio is the zoom factor of the factory-standard lens for each model (upper limit ÷ lower limit of its throw ratio range), not the zoom range of the lens featured in this article.

Factory Lens Model Options

12 of these models can be fitted with factory lenses. See the corresponding throw ratio for each lens model below for comparison with factory configurations.

Optoma Factory Lenses

The 0.35:1 model featured here is closest in focal range to the factory A17 (0.65 ~ 0.75), making it easy to compare the options and select the most suitable lens.

Common Characteristics of These Models

The factory-standard lenses for the 33 models generally have throw ratios of 1.22-1.52:1. The 0.35:1 model featured here effectively changes the focal length, allowing the same projection distance to produce a different image size—the practical reason for replacing the lens. It also retains full lens-shift capability, so the image can still be aligned after the focal length is changed.

4. Three Checks Before Replacement

• Ensure the panel and resolution match. This model is designed for 0.67-inch panels. Projection performance may vary on projectors with different panel sizes or resolutions, so verify the specifications against the projector nameplate before installation.
• Check the interface and locking mechanism. Interfaces are generally compatible within the same platform generation, but locking latch positions vary by generation. If the image appears skewed or the edges are not sharp after installation, the lock is usually not fully engaged rather than the lens being faulty.
• A fixed-focus lens has no zoom adjustment. Image size can only be changed by moving the projector, so measure the venue accurately and allow an additional 10–20 cm at each endpoint.

For compatibility with a model not listed, send us the projector nameplate and a photo of the original lens for verification. Mounts are often shared across platforms of the same generation, but ordering based only on a similar model designation carries unnecessary risk.