Barco R9852920 Zoom Telephoto Lens: Compatible with XDL-4K30 XDL-4K60 XDL-4K75

Genuine Barco R9852920 Zoom Lens is an original optical accessory for Barco engineering projectors. It is a long-throw lens with a 5.50-8.50:1 throw ratio. The official compatibility list covers 3 models. Before installation, verify the projector model and panel size; adapter rings are unnecessary. The value of a genuine lens lies not in the extra rows of specifications, 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 focus travel all operate at their design values, so keystone correction is not needed to compensate for image quality.

I. Lens Specifications

These specifications are subject to the manufacturer's official specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please provide the projector model so we can verify the details with you. Ordering based solely on a similar model carries the risk that the lens will not fit.

II. Converting Throw Ratio to Installation Distance

The throw ratio is the ratio of the installation distance to the image width. This genuine zoom lens has a throw ratio of 5.50-8.50:1, so a given image size corresponds to a range of installation distances. It 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 the space required behind the projector for ventilation and cable connections. They are calculated for a 16:10 aspect ratio; actual distances are subject to on-site measurements and the manufacturer's manual.

Image quality differs at the two ends of the zoom range: toward the short end, the image is brighter and the edges are slightly softer; toward the long end, the edges are crisper and brightness is slightly lower. Where the venue allows, we recommend positioning the lens in the middle of the range. After installation, find the sharpest position using the focus ring, then fine-tune the lens shift.

III. Compatible Models (3 Models)

The following table is taken from the official compatibility list. Brightness and resolution are populated from the model database; entries that cannot be verified are shown as "—", without estimates.

To verify whether a model not on the list is compatible, send us photos of the projector nameplate and the existing lens. Platforms from the same generation often share the same mount, but ordering based solely on a similar model is not worth the risk.

Throw Ratios for Different Model Series

The nominal throw ratio varies by model series when the same R9852920 Zoom lens is installed on the series listed below. Select the value for the actual projector series.

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 image, resulting in vignetting or light loss at the edges.
• Calculate the installation distance first. This lens has a rated throw ratio of 5.50-8.50:1. Use the table in Section 2 to match it to your venue dimensions. A fixed-focus lens offers no adjustment margin, while a zoom lens should still allow for 10–20 cm of leeway at both ends.
• Verify the mount and locking mechanism. Genuine lenses are calibrated to the mount of the corresponding projector series. You must hear the lens click into the locked position 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 existing lens nameplate and send them to us. Verification against the physical items is the safest approach.