Barco R9801211 Long Zoom Lens Guide for Medea

Barco original lens R9801211 Long Zoom is an OEM optical accessory for Barco engineering projectors. It is a long-throw (Long Throw) lens with a throw ratio of 3.30-6.08:1. The OEM compatibility list covers one projector model. Before installation, simply verify the projector model and panel size; no adapter rings are needed. The value of an OEM lens lies not in the additional figures in its specification sheet, but in the fact that it is factory-calibrated to the optical path and mount of that projector series. Once installed, the image circle, edge illumination, and focus travel all match the design values, with no need to use keystone correction to compensate for image quality.

I. Lens Specifications

Brand	Barco (Barco)
Lens Model	R9801211 Long Zoom
Throw Ratio	3.30-6.08:1
Product Type	Long Throw
Compatible Models	1 Model
Warranty	12 months; after-sales service is available for damage not caused by the user, subject to the date on the delivery receipt

The above specifications are subject to the OEM specifications. Mechanical dimensions, flange distance, and mount type are not shown in the specification table. Please verify them with us using the projector model, as ordering solely on the basis of a similar model carries the risk that the lens will not fit.

II. Converting Throw Ratio into Installation Distance

The throw ratio is the ratio of the installation distance to the image width. This OEM lens is a zoom lens (3.30-6.08:1), so the same image size corresponds to a range of installation distances. The lens can be focused at any position within that range.

Image Size	Image Width	Required Installation Distance
100 inches	2.15 m	Approx. 7.09 – 13.07 m
120 inches	2.58 m	Approx. 8.51 – 15.69 m
150 inches	3.22 m	Approx. 10.64 – 19.61 m
200 inches	4.30 m	Approx. 14.19 – 26.14 m

The distances above are clear distances from the front of the lens to the screen and do not include clearance for rear projector cooling or cable connections. They are calculated for a 16:10 image; in practice, rely on on-site measurements and the OEM 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 the venue allows, use a position in the middle of the range. After installation, first turn the focus ring to the sharpest position, then fine-tune the lens shift.

III. Compatible Models (1 Model)

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

Model	Brightness	Resolution
Medea	6500 lumens	3840x2160

To confirm whether a model not on the list can be used, send us a photo of the projector nameplate and the existing lens. Platforms from the same generation often share the same mount, but the risks of ordering solely on the basis of a similar model are not worth taking.

Throw Ratios by Projector Series

The nominal throw ratio varies by series when the same R9801211 Long Zoom is installed on the series listed below. For product selection, use the value for the actual projector series.

Projector Series	Throw Ratio
—	3.30-6.08:1

IV. Three Checks Before Replacement

• Check the projector panel and resolution. OEM 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 after installation.
• Calculate the installation distance first. This lens has a nominal throw ratio of 3.30-6.08:1. Use the table in Section II to determine the distance for your venue. A fixed-focus lens offers no adjustment margin, and even a zoom lens should allow an additional 10–20 cm at both ends of the range.
• Verify the mount and locking mechanism. The OEM 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 are usually caused by incomplete locking rather than a fault in the lens itself.

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