WB014 Projector Lens 0.78–0.81:1 for BOBLITH MX660B, MX655, MW650, MW658, AL6855, MU655, MU658

WB014 is a short-throw lens for 0.64-inch panels (BenQ), with a throw ratio of 0.78–0.81:1 and lens shift. It is compatible with 7 projector models across 1 model series. This guide consolidates the lens specifications, installation distances, 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 the image to be repositioned using lens shift, without requiring keystone correction. Keystone correction comes at a cost—each adjustment step sacrifices some effective pixels and leaves text edges blurred. In professional installations, keystone correction should never be used when lens shift can resolve the alignment issue; preserving image quality is the non-negotiable priority.

2. Calculating Installation Distance from Throw Ratio

The throw ratio is the installation distance divided by the image width. This lens supports zoom (0.78–0.81:1), so each image size corresponds to a range of distances, and the image can be focused at any distance within that range during installation.

The values above represent the clear distance from the front lens element to the screen and do not include space for rear housing ventilation and wiring. They are calculated for a 16:10 image aspect ratio; actual distances should be verified through on-site measurements and the user manual.

Image quality differs at the two ends of the zoom range: at the near end, the image is brighter but the edges are slightly softer; at the far end, the edges are sharper and brightness is slightly lower. When site conditions allow, use the middle of the range. After installation, first find the sharpest position using the focus ring, then fine-tune the lens shift—adjusting both at once makes it difficult to dial in the ideal setting.

3. Compatible Projector Models (7 BenQ Models)

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

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

Common Features of These Models

The original standard lenses for these 7 models generally have throw ratios within 1.08-1.76. The 0.78–0.81:1 ratio of the model featured in this article effectively modifies the focal range, enabling a different image size at the same projection distance—this is the direct reason for replacing the lens. It also retains the full lens-shift capability, allowing the image to be realigned after the focal range is adjusted.

4. Three Checks Before Replacement

• Panel size and resolution must match. This model is compatible with 0.64-inch panels. Projectors with a different panel size or resolution may produce slightly different projection performance, so checking the chassis nameplate before installation is the safest approach.
• Interfaces and locking mechanism. Interface compatibility is generally good across platforms of the same generation, but locking clip positions differ by generation. If the image is skewed or the edges are not sharp after installation, the locking clip is usually not fully engaged; this is not a fault of the lens itself.
• Allow for lens-shift margin in the installation plan. The shift range provides some installation flexibility, but edge image quality declines when it is pushed to its limits; actual use should remain within 70% of the specified values.

For models not on the list, it is safer to send us photos of the projector nameplate and original lens for verification—platforms of the same generation often share the same interface, but placing an order based only on a similar model designation carries risks that are not worth taking.