Barco R9852100 Zoom Long-Throw Lens Guide: Compatible with XDL-4K30 XDL-4K60 XDL-4K75

Barco Genuine Lens R9852100 Zoom is an original optical accessory for Barco engineering projectors in the long-throw (Long Throw) category, with a throw ratio of 2.80-5.50:1. The official compatibility list covers 3 models; before installation, simply verify the projector model and panel size—no adapter rings are needed. The value of a genuine lens lies not in the extra numbers in its specification table, but in the fact that it is calibrated at the factory to the optical path and mount of that model series: once installed, the image circle, edge illumination, and focus travel all perform as designed, eliminating the need to use keystone correction to compensate for image quality.

1. Lens Specifications

The manufacturer's official specifications take precedence. Mechanical dimensions, flange distance, and mount type not shown in the specification table should be confirmed with us based on the projector model; placing an order solely because the model numbers are similar risks obtaining a lens that will not fit.

2. Converting Throw Ratio to Installation Distance

The throw ratio is the ratio of the installation distance to the image width. This genuine zoom lens (2.80-5.50:1) covers a range of installation distances for the same image size and can focus anywhere within that range.

The distances above are the clear distances from the front surface of the lens to the screen and do not include clearance for heat dissipation and cable connections at the rear of the projector. They are calculated for a 16:10 image; in practice, rely on on-site measurements and the manufacturer's manual.

Image quality differs at the two ends of the zoom range: near the short end, the image is brighter and the edges are slightly softer; near the long end, the edges are sharper and brightness is slightly lower. When the venue allows, use the middle of the range; after installation, first find the sharpest position on the focus ring, then fine-tune the lens shift.

3. Compatible Models (3 Units)

The table below is taken from the official compatibility list. Brightness and resolution are populated from the model database; where the data is unavailable, “—” is shown rather than estimated.

For models not on the list, send us photos of the projector nameplate and the existing lens for verification—platforms from the same generation often share a mount, but ordering based solely on a similar model name carries an avoidable risk.

Throw Ratios by Model Series

The nominal throw ratio varies by series when the same R9852100 Zoom is installed on the models below, so select the value for the series of the projector you actually have.

4. Three Checks Before Replacement

• Confirm the projector's imaging panel 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 edge light loss after installation.
• Calculate the installation distance first.This lens has a nominal throw ratio of 2.80-5.50:1. Use the table in Section 2 to calculate the distance based on your venue dimensions. A prime lens offers no adjustment range, while a zoom lens should still allow a 10–20 cm margin at both ends.
• Verify the mount and locking mechanism.The genuine lens is calibrated to the mount of that model series. After installation, you must hear the locking mechanism engage. 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 the projector nameplate and one of the existing lens nameplate and send them to us; verification against the actual products is the safest approach.