BenQ 5J.JDH37.022 Standard Zoom Projector Lens for W8000

BenQ Original Lens 5J.JDH37.022 Standard Zoom is an original optical accessory for BenQ professional projectors. It is a standard-throw lens (Standard Throw) with a throw ratio of 1.54:1 - 1.93:1. The factory compatibility list covers one model, so before installation, simply verify the projector model and panel size. There is no need to resort to adapter rings. The value of an original factory lens lies not in the additional figures in its specifications, but in its factory calibration to the optical path and lens mount of the corresponding projector series. Once installed, image circle coverage, edge illumination, and focus travel all meet their design values, with no need to use keystone correction to compensate for image quality.

I. Lens Specifications

These specifications are subject to the original manufacturer's specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please contact us with the projector model. Placing an order solely based on a similar model may result in fitment issues.

II. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of installation distance to image width. This original factory lens is a zoom lens (1.54:1 - 1.93:1), so the same image size corresponds to a range of installation distances. The lens can focus at any position within this range.

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. They are calculated for a 16:10 image; in practice, refer to on-site measurements and the manufacturer's manual.

Image quality varies at the two ends of the zoom range: toward the short-throw end, the image is brighter and the edges are slightly softer; toward the long-throw end, the edges are sharper and brightness decreases slightly. When space permits, use the middle of the range. After installation, find the sharpest position using the focus ring, then fine-tune the lens shift.

III. Compatible Models (1 model)

The table below is taken from the factory compatibility list. Brightness and resolution are populated from the model database; unavailable values are shown as “—” and are not estimated.

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

Throw Ratio by Model Series

The nominal throw ratio differs among the following series when the same 5J.JDH37.022 Standard Zoom lens is installed. Use the value corresponding to the actual projector series when selecting a lens.

IV. Three Checks Before Replacement

• Confirm the projector's imaging chip and resolution. Each factory lens is designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the full image area, resulting in vignetting or edge light loss.
• Calculate the installation distance first. This lens has a rated throw ratio of 1.54:1 - 1.93:1. Use the table in Section 2 to calculate the distance for your venue. A fixed-focus lens offers no adjustment margin, while a zoom lens should have 10–20 cm of margin at both ends.
• Verify the mount and locking mechanism. The factory lens is calibrated for the mount of the corresponding projector series. You must hear it click into the locked position after installation. A skewed image or soft edges are usually caused by incomplete locking, rather than an issue with the lens itself.

If you are unsure, send us one photo of the projector nameplate and one of the existing lens nameplate. Verification against the actual hardware is the safest approach.