Barco R9832745 Zoom Long-Throw Lens for MSWU-81E, RLM-W6, RLM-W8

Barco Original Lens R9832745 Zoom is an original optical accessory for Barco engineering projectors. It is designed for long-throw (Long Throw) applications, with a throw ratio of 2.90-4.34:1. The factory compatibility list covers 3 models. Before installation, verify the projector model and panel size—there is no need to resort to adapter rings. The value of an original lens lies not in the additional figures in the specification sheet, 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 are all at their design values, eliminating the need to use keystone correction to compensate for image quality.

I. Lens Specifications

The above specifications are subject to the manufacturer's specifications. For mechanical dimensions, flange distance, and mount type not listed in the specifications table, please contact us with the projector model for verification. Ordering based solely on a similar model carries the risk that the lens will not fit.

II. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of the installation distance to the image width. This original lens is a zoom lens (2.90-4.34:1), so a single image size corresponds to a range of distances, and the lens can focus at any installation distance within that range.

These figures represent the clear distance from the lens front surface to the screen and do not include space for rear chassis ventilation or cable connections. They are calculated for a 16:10 image; actual distances should be confirmed through on-site measurement and the manufacturer's manual.

Image quality varies at the two ends of the zoom range: at the short-throw end, the image is brighter and the edges are slightly softer; at the long-throw end, the edges are sharper and brightness is slightly lower. When 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.

III. Compatible Models (3 models)

The following table is taken from the factory compatibility list. Brightness and resolution are populated from the model database; entries that cannot be obtained are shown as “—” and have not been estimated.

To confirm whether a model not on the list is compatible, please send us photos of the projector nameplate and the existing lens for verification—platforms of the same generation often share the same mount, but the risks of ordering based solely on a similar model are not worth taking.

Throw Ratios by Projector Series

The nominal throw ratio differs when the same R9832745 Zoom lens is installed on the following projector series. For selection purposes, use the value corresponding to the actual projector's series.

IV. Three Checks Before Replacement

• Confirm the projector chip and resolution. Original lenses are designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the full image, resulting in vignetting or edge illumination loss after installation.
• Calculate the installation distance first. This lens has a nominal throw ratio of 2.90-4.34:1. Use the table in Section 2 to calculate the distance for your venue. Fixed-focus lenses provide no adjustment margin, and even zoom lenses require 10–20 cm of clearance at both ends.
• Verify the mount and locking mechanism. The original lens is calibrated to the mount of the relevant projector series. After installation, you must hear it click into its locked position. A skewed image or soft edges usually indicate that the lens is not fully locked, rather than a problem with the lens itself.

If you are unsure, take one photo of each of the projector nameplate and the existing lens nameplate and send them to us. Verification against the actual items is the safest approach.