WB066 Projector Lens for 10 Ricoh Engineering Projectors (0.74–0.77:1)

WB066 is a short-throw lens for the 0.65/0.66/0.67 panel group (Ricoh), with a throw ratio of 0.74–0.77:1 and lens shift. It is compatible with 10 models across 2 model series. This article presents the lens specifications, installation distances, model compatibility list, and key replacement considerations in one place.

1. Lens Specifications

Lens shift is the key distinguishing feature of this lens. The horizontal 70.30% and vertical 32% shift ranges allow the projector to be installed off the screen’s central axis, with lens shift bringing the image back into alignment without requiring keystone correction. Keystone correction comes at a cost—each correction step reduces the effective pixel count and can blur text edges. In professional installations, lens shift should always be used when it can resolve the issue; this is the baseline for image quality.

2. Calculating Installation Distance from Throw Ratio

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 the lens can focus anywhere 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 behind the chassis for cooling and cabling. They are calculated for a 16:10 image; actual on-site measurements and the manual take precedence.

Image quality differs at the two ends of the zoom range: near the shorter end, the image is brighter and the edges are slightly softer; near the longer 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 variables at the same time makes precise alignment difficult.

3. Compatible Models (10 Models, Ricoh)

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

The zoom ratio is the zoom factor of the factory-standard lens supplied with that model (upper limit of the original throw-ratio range ÷ lower limit), not the zoom range of the lens described in this article.

OEM Lens Model Options

Among these models, 2 models allow the installation of OEM lenses. The throw ratio for each lens model is listed below for comparison with OEM solutions.

Ricoh OEM Lens

The 0.74–0.77:1 ratio of the model covered here is closest to the focal range of the OEM A3A (1.22-1.52), enabling direct comparison and selection.

Common Features of These Models

The factory-standard lenses for the 10 models generally have throw ratios concentrated around 1.22-1.52:1. The 0.74–0.77:1 ratio of the model covered here adjusts the focal range, allowing different image sizes from the same projection distance—the direct reason for replacing the lens. Full lens-shift capability is retained, so the image can still be aligned after the focal range is adjusted.

4. Three Checks Before Replacement

• Confirm the panel and resolution match. This model is compatible with 0.67 inches panels. Projectors with a different panel size or resolution may produce different projection performance, so checking the chassis nameplate before installation is recommended.
• Check the interface and locking mechanism. Interfaces are generally compatible within the same platform generation, but locking-tab positions can vary by generation. If the image appears skewed or the edges are not sharp after installation, the issue is usually an incompletely engaged lock rather than the lens itself.
• Allow for lens-shift margin in the installation. The shift range provides installation flexibility, but edge quality declines when the shift is pushed to its limits. Actual shift should generally be kept within 70% of the rated value.

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