WB068 Projector Lens 0.74–0.77:1 for 12 PANJITE Models

WB068 is a short-throw lens for 0.65/0.66/0.67 panels (ViewSonic), with a throw ratio of 0.74–0.77:1 and lens shift. It is compatible with 12 projector models across 1 model series. This article presents the lens specifications, installation distances, compatible model list, and replacement considerations in one place.

1. Lens Specifications

Lens shift is the key distinguishing feature of this lens. A shift range of 70.30% horizontally and 32% vertically allows the projector to be installed off-center from the screen, with the image repositioned through lens shift rather than keystone correction. Keystone correction comes at a cost—each correction step reduces the effective pixel count and can blur text edges. In professional installations, never use keystone correction when lens shift can solve the alignment issue; preserving image quality is essential.

2. Calculating Installation Distance from Throw Ratio

Throw ratio is the ratio of installation distance to image width. This lens has a zoom range of 0.74–0.77:1, so a given image size corresponds to a range of installation distances. The lens can be focused at any distance within that range during installation.

These figures represent the clear distance from the front surface of the lens to the screen and do not include clearance for rear cooling and cable connections. Calculations are based on a 16:10 aspect ratio; actual values should be confirmed through on-site measurements and the manual.

Image quality varies between the two ends of the zoom range: the short end produces a brighter image with slightly softer edges, while the long end provides sharper edges with slightly lower brightness. Where conditions allow, the middle of the range is recommended. After installation, find the sharpest position using the focus ring, then fine-tune the lens shift—precise adjustment is difficult when both controls are adjusted simultaneously.

3. Compatible Models (12 ViewSonic Models)

The following table is ordered by model production date, from newest to oldest. It includes the resolution, brightness, and factory-installed lens zoom ratio for each model, enabling quick selection according to project requirements.

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

Common Features of These Models

The factory-installed standard lenses for the 12 models generally have throw ratios concentrated in the 1.22-1.52:1 range. The 0.74–0.77:1 ratio of the WB068 provides a different throw range, allowing different image sizes from the same projection distance—this is the direct reason for replacing the lens. Full lens-shift capability is retained, so the image can still be properly aligned after changing the throw range.

4. Three Checks Before Replacement

• Confirm the panel and resolution. This model supports a 0.67-inch panel. Projection performance may vary for projectors with different panel sizes or resolutions, so checking the nameplate on the projector before installation is recommended.
• Check the interface and locking mechanism. Interfaces are generally compatible within the same platform generation, but the position of the locking latch may vary between generations. A skewed image or soft edges after installation usually indicate that the lock is not fully engaged rather than a problem with the lens itself.
• Include lens-shift margin in the installation plan. The shift range provides installation flexibility, but edge image quality declines at the limits. Actual shift usage should be kept within 70% of the specified values.

For models not included in the list, the safest approach is to send the projector nameplate and a photo of the original lens for verification. Same-generation platforms often share the same interface, but the risk of ordering based only on a similar model name is not worth taking.