BenQ 5J.JDH37.032 Semi Long Zoom Standard-Throw Lens for W8000

BenQ Genuine Lens 5J.JDH37.032 Semi Long Zoom is a factory-supplied optical accessory for BenQ engineering projectors, featuring a Standard Throw design and a 1.93:1 - 2.90:1 throw ratio. The factory compatibility list covers one model. Before installation, simply verify the projector model and panel size; there is no need to make do with an adapter ring. The value of a genuine lens lies not in the additional specifications it provides, but in the fact that it is calibrated at the factory to the optical path and mount of that projector series. Once installed, the image circle, edge illumination, and focusing travel all meet the design values, with no need to use keystone correction to compensate for image quality.

I. Lens Specifications

The above specifications are subject to the factory specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications, please contact us with the projector model. Ordering solely because the model names appear similar may result in the lens not fitting.

II. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of the installation distance to the image width. This genuine zoom lens (1.93:1 - 2.90:1) supports a range of distances for the same image size and can focus at any distance within that range.

These figures represent the clear distance from the front of the lens to the screen and do not include clearance behind the projector for cooling and cable connections. They are based on a 16:10 image; in practice, follow on-site measurements and the factory manual.

Image quality differs at the two ends of the zoom range: toward the near end, the image is brighter and the edges are slightly softer; toward the far end, edge definition is sharper and brightness is slightly lower. Where space allows, use the middle of the range. After installation, first find the sharpest setting on the focus ring, then fine-tune the lens shift.

III. Compatible Models (1 Model)

The table below comes from the factory compatibility list. Brightness and resolution are populated from the model database; “—” indicates that the data is unavailable. No specifications are inferred.

To determine whether an unlisted model is compatible, send us photos of the projector nameplate and the current lens for verification. Platforms of the same generation often share a mount, but ordering based solely on a similar model name carries unnecessary risk.

Throw Ratios by Model Series

The nominal throw ratio of the same 5J.JDH37.032 Semi Long Zoom lens varies by series. When selecting a lens, use the series of the actual projector.

IV. Three Checks Before Replacement

• Confirm the projector imaging chip and resolution.Genuine lenses are designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the full panel, resulting in vignetting or edge light loss after installation.
• Calculate the installation distance first.This lens has a rated throw ratio of 1.93:1 - 2.90:1. Apply the table in Section II to the dimensions of your venue. A fixed-focus lens offers no adjustment margin, and even a zoom lens should allow for 10–20 cm of margin at both ends.
• Check the mount and locking mechanism.The genuine lens is calibrated to the mount of that projector series. You must hear it lock into place after installation. A skewed image or soft edges are usually caused by incomplete locking rather than a problem with the lens itself.

If you are unsure, take one photo of the projector nameplate and one of the current lens nameplate, then send them to us. Verification against the physical products is the safest approach.