Barco R9801721 GLD Zoom Long-Throw Lens for F80-4K12 F80-4K7 F80-4K9 F80-Q12 F80-Q7 F80-Q9

Barco Original Lens R9801721 GLD Zoom is an original optical accessory for Barco professional projectors. It is a long-throw (Long Throw) lens with a throw ratio of 2.12-3.18:1. The official compatibility list covers 6 models; before installation, simply verify the projector model and panel size, with no need to improvise with an adapter ring. The value of an original lens lies not in the extra figures added to the specification sheet, but in the fact that it is calibrated at the factory to the optical path and lens mount of the relevant model series: once installed, the image circle, edge illumination, and focusing range are all as designed, so there is no 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 provide your projector model so we can verify them. Ordering based solely on a similar model carries the risk that the lens will not fit.

2. Converting Throw Ratio into Installation Distance

The throw ratio is the ratio of the installation distance to the image width. This original lens is a zoom lens (2.12-3.18:1), so each image size corresponds to a range of installation distances, and the lens can focus anywhere within that range.

These are clear distances from the front of the lens to the screen, excluding space for cooling and cable connections at the rear of the projector. The values are calculated for a 16:10 image; actual installation should be confirmed through on-site measurements and the manufacturer's manual.

Image quality differs at the two ends of the zoom range: toward the near end, the image is brighter and the edges are slightly softer; toward the far end, the edges are sharper and brightness decreases slightly. Where site conditions allow, we recommend using 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 (6 Models)

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

For use with a model not on the list, please send us photos of the projector nameplate and the existing lens for verification. Platforms from the same generation often share the same mount, but ordering based on a similar model is not worth the risk.

Throw Ratio by Model Series

The nominal throw ratio of the same R9801721 GLD Zoom differs by model series, so use the value for the series of the actual projector when selecting a lens.

4. Three Checks Before Replacement

• Confirm the projector chipset and resolution. The original lens is 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 2.12-3.18:1. Use the table in Section 2 to calculate the distance for your site dimensions. A fixed-focus lens provides no adjustment margin, and even a zoom lens requires 10–20 cm of allowance at both ends of the range.
• Verify the mount and locking mechanism. The original lens is calibrated to the mount of that projector series, and you must hear it lock into place after installation. A skewed image or soft edges usually indicates that the lens is not fully locked, rather than a problem with the lens itself.

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