Barco R9832770 Zoom Long-Throw Lens Guide: PHWU-81B PHWX-81B PHXG-91B

Barco Original Lens R9832770 Zoom is an OEM optical accessory for Barco professional projectors. It is a long-throw lens (Long Throw) with a throw ratio of 4.50-8.70:1. The official compatibility list covers 3 models; before installation, simply verify the projector model and panel size without resorting to adapter rings. The value of an original lens lies not in the additional figures on a specification sheet, but in its factory calibration to the optical path and lens mount of that projector series: the image circle, edge illumination, and focusing travel are all delivered at their design values, eliminating the need to compensate for image quality with keystone correction.

1. 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 specifications table, please contact us with the projector model. Ordering based solely on a similar model carries the risk that the lens will not fit.

2. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of installation distance to image width. This original lens is a zoom lens (4.50-8.70:1), so each image size corresponds to a range of installation distances, and it can focus at any distance within that range.

These figures represent the clear distance from the front surface of the lens to the screen and do not include clearance behind the projector for cooling and cable connections. They are calculated for a 16:10 image; actual distances should be verified on site and according to the manufacturer's manual.

Image quality varies at the two ends of the zoom range: near the close end, the image is brighter and the edges are slightly softer; near the far end, the edges are sharper and brightness is slightly lower. Where site conditions allow, it is recommended to use the middle of the range. After installation, first find the sharpest setting on the focus ring, then fine-tune the lens shift.

3. Compatible Models (3 Projectors)

The table below is taken from the official compatibility list. Brightness and resolution are populated from the model database; when unavailable, they are marked “—” and are not estimated.

For compatibility with a model not on the list, send us photos of the projector nameplate and the existing lens so we can verify it. Platforms from the same generation often share a mount, but ordering based only on a similar model is not worth the risk.

Throw Ratio by Projector Series

The nominal throw ratio differs by projector series when the same R9832770 Zoom is installed. Select the value that corresponds to the series of the actual projector.

4. Three Checks Before Replacement

• Confirm the projector's imaging chip and resolution. Original lenses are designed for a specific panel size. If the panel specifications differ, the image circle cannot provide full coverage, causing vignetting or edge light loss.
• Calculate the installation distance first. This lens has a rated throw ratio of 4.50-8.70:1. Use the table in Section 2 to calculate the distance for your site. A fixed-focus lens offers no adjustment margin, and a zoom lens should still have 10–20 cm of clearance at both ends of the range.
• Verify the mount and locking mechanism. The original lens is calibrated for the mount on that projector series, and you must hear it lock securely into place after installation. A skewed image or soft edges are usually caused by incomplete locking, not a problem with the lens itself.

If you are unsure, take one photo of the projector nameplate and one of the current lens nameplate and send them to us. Verification against the actual equipment is the most reliable approach.