WB016 Projector Lens 0.78–0.81:1 Compatible with Hualu HL-E555U and 1 Other Engineering Projector

WB016 is a short-throw lens for a 0.64-inch panel (Hualu), with a throw ratio of 0.78–0.81:1 and lens shift. It is compatible with 1 projector model in 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 the key differentiator of this lens. The 76.00% horizontal and 47.70% vertical shift ranges allow the projector to be installed off the screen centerline and brought back into alignment through lens shift without using keystone correction. Keystone correction comes at a cost—each adjustment reduces the effective pixel count and can blur text edges. In professional installations, avoid keystone correction whenever lens shift can solve the problem; this is essential to image quality.

2. Installation Distance from Throw Ratio

The throw ratio is the ratio of the installation distance to the image width. This is a zoom lens (0.78–0.81:1), so each image size corresponds to a range of installation distances; focus can be achieved anywhere within that range.

These distances are the clear distances from the front of the lens to the screen and do not include clearance behind the projector for heat dissipation and cable connections. Values are calculated for a 16:10 image; actual values must be verified on site and against the manual.

Image quality differs at the two ends of the zoom range: near the short end, the image is brighter and the edges are slightly softer; near the long end, the edges are sharper and brightness decreases slightly. When the venue allows, use a position near the middle of the range. After installation, first find the sharpest setting on the focus ring, then fine-tune the lens shift—adjusting both variables at the same time makes precise alignment difficult.

3. Compatible Models (1 Model, Hualu)

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

The zoom factor is based on the original standard lens for this model (the upper limit ÷ the lower limit of the original throw-ratio range), and does not represent the zoom range of the lens featured in this article.

Common Features of These Models

For this 1 model, the original standard lens generally has a throw ratio centered around 1.08-1.76. The 0.78–0.81:1 ratio of the model featured in this article effectively modifies the focal-length range, allowing a different image size at the same projection distance—this is the direct reason for replacing the lens. Full lens-shift capability is retained as well, so the image can still be aligned after the focal-length range is adjusted.

4. Three Checks Before Replacement

• The panel and resolution must match. This model is designed for a 0.64-inch panel. Projectors with a different panel size or resolution will show some variation in projection performance; checking the projector nameplate before installation is the safest approach.
• Interfaces and locking mechanism. Interfaces are generally compatible across platforms of the same generation, but the locking-tab positions vary by generation. If the image is skewed or the edges are not sharp after installation, the most likely cause is an incompletely engaged locking mechanism, not a problem with the lens itself.
• Allow for lens-shift margin in the installation. The shift range provides some installation flexibility, but edge image quality deteriorates at the limits. For typical use, keep the adjustment within 70% of the specified value.

For models not included in the list, the safest approach is to send us the projector nameplate and a photo of the original lens for verification—platforms of the same generation often share the same interface, but ordering based on a similar model number creates unnecessary risk.