BenQ 5J.JDH37.001 Wide Fixed Short-Throw Lens Guide: HT6050 PU9220 PU9220+ PX9210

BenQ Original Lens 5J.JDH37.001 Wide Fixed is a factory-supplied optical accessory for BenQ business projectors. It is a short-throw (Short Throw) lens with a throw ratio of 0.78:1. The official compatibility list covers 4 projector models; before installation, simply verify the projector model and panel size—no need to improvise with adapter rings. The value of an original lens lies not in adding a few more figures to the specification table, but in its factory calibration for the optical path and mount of the corresponding projector series. Once fitted, the image circle, edge illumination, and focus travel all match their design values, eliminating the need to use keystone correction to compensate for image quality.

I. Lens Specifications

The above specifications are based on the manufacturer's official specifications. For mechanical dimensions, flange distance, and mount type not shown in the specification table, please contact us with your projector model so we can verify them. Placing an order based solely on a similar model carries the risk that the lens will not fit.

II. Calculating Installation Distance from the Throw Ratio

The throw ratio is the ratio of the installation distance to the image width. This original lens has a fixed focal length (0.78:1), so its installation distance varies linearly with image size and offers no adjustment range. Accurate measurements are therefore essential before installation.

These distances represent the clear distance from the front surface of the lens to the projection screen and do not include clearance behind the projector for cooling and cable connections. The calculations are based on a 16:10 image; actual distances should be confirmed through on-site measurement and the manufacturer's manual.

III. Compatible Projector Models (4 models)

The following table is based on the manufacturer's official compatibility list. Brightness and resolution are populated from the model database; entries that cannot be verified are shown as “—” and have not been estimated.

To determine whether a model not on the list is compatible, send us photos of the projector nameplate and the existing lens for verification. Projector platforms from the same generation often share a mount, but it is not worth ordering based on a similar model and taking the risk.

Throw Ratio by Projector Series

When the same 5J.JDH37.001 Wide Fixed is installed on the series listed below, the rated throw ratio varies. When selecting a lens, use the value corresponding to the actual projector series.

IV. Three Checks Before Replacement

• Confirm the projector's imaging chip and resolution. The original lens is designed for a specific panel size. With different panel specifications, the image circle cannot cover the full image, causing vignetting or light loss at the edges after installation.
• Calculate the installation distance first. This lens has a rated throw ratio of 0.78:1; use the table in Section II to calculate the distance for your installation space. A fixed-focal-length lens offers no adjustment margin, and even with a zoom lens, allow an extra 10–20 cm at both ends.
• Verify the mount and locking mechanism. The original lens is calibrated to the mount used in that projector series. After installation, you must hear the locking mechanism engage fully. A skewed image or soft edges is 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 existing lens nameplate, then send them to us. Verification against the actual hardware is the safest approach.