WB280 Projector Lens 0.74–0.77:1 for Hisense P80, P100, P120 and 2 Other Models

WB280 is a short-throw lens for the 0.65/0.66/0.67 panel group (Hisense), featuring a 0.74–0.77:1 throw ratio and lens shift. It is compatible with 3 models across 1 model series. This article presents the lens specifications, installation distance, model compatibility list, and key replacement considerations in one place.

1. Lens Specifications

Lens shift is the key differentiator of this lens. Its horizontal 70.30% and vertical 32% shift range allows the projector to be installed off the screen centerline and the image repositioned through lens shift without requiring keystone correction. Keystone correction comes at a cost—each correction step reduces the effective pixel count and makes text edges appear blurred. In professional installations, never resort to keystone correction when lens shift can solve the problem; preserving image quality is the non-negotiable priority.

2. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of installation distance to image width. This is a zoom lens (0.74–0.77:1), so each image size corresponds to a range of distances, and it can focus at any position within that range during installation.

The distances above represent the clear distance from the front face of the lens to the screen and do not include clearance behind the chassis for cooling and cable connections. They are calculated for a 16:10 image; actual values should be verified through on-site measurements and the manual.

Image quality varies at the two ends of the zoom range: the image is brighter with slightly softer edges near the short end, while the edges are sharper with slightly reduced brightness near the long end. When site conditions allow, aim for the middle of the range. After installation, first find the sharpest setting on the focus ring, then fine-tune the lens shift—adjusting both at the same time makes precise alignment difficult.

3. Compatible Models (3 Models, Hisense)

The following table is ordered 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 Features of These Models

The throw ratios of the factory-standard lenses for all 3 models generally fall around Depends on the lens. The 0.74–0.77:1 model featured in this article provides an adjusted focal range, enabling different image sizes from the same projection distance—this is the direct reason for replacing the lens. It also retains full lens-shift capability, allowing the image to be realigned after the focal range is changed.

4. Three Checks Before Replacement

• Panel size and resolution must match. This model is designed for a 0.67-inch panel. Projection performance may vary slightly on projectors with a different panel size or resolution, so checking the chassis nameplate before installation is the most reliable approach.
• Connector interface and locking mechanism. Connector compatibility is generally good within the same generation platform, but the position of the locking tabs may differ 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 itself being faulty.
• Account for lens-shift margin in the installation. The shift range provides some installation flexibility, but edge image quality declines when the lens is shifted to its limit. For typical use, keep the actual shift within 70% of the rated value.

For reliable confirmation of compatibility with models not on this list, send us the chassis nameplate and a photo of the original lens for review—platforms of the same generation often share connectors, but ordering solely based on a similar model designation carries unnecessary risk.