Christie 129-107109-XX HB Zoom Long-Throw Lens Guide: 7 Compatible Models

Christie OEM Lens 129-107109-XX HB Zoom is an OEM optical accessory for Christie engineering projectors. It is a long-throw lens with a throw ratio of 2.03-2.71:1. The OEM compatibility list covers 7 models; before installation, simply verify the projector model and panel size—no adapter rings needed. The value of an OEM lens lies not in a few extra specification entries, 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 designed values, with no need to compensate for image quality through keystone correction.

I. Lens Specifications

These specifications are subject to the OEM specifications. Mechanical dimensions, flange distance, and mount type not shown in the table should be verified with us based on the projector model; ordering solely because the model numbers are similar risks a lens that 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 OEM lens is a zoom lens (2.03-2.71:1), so a given image size corresponds to a range of installation distances. The lens can be focused at any position within that range.

The distances above are clear distances from the front of the lens to the screen and do not include space behind the projector for ventilation and cabling. These figures are based on a 16:10 image; confirm the actual installation by on-site measurement and in accordance with the OEM manual.

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

III. Compatible Models (7 Models)

The following table is taken from the OEM compatibility list. Brightness and resolution have been added based on the model database; unavailable entries are marked “—” without any assumptions.

For models not included in the list, send us photos of the projector nameplate and the existing lens for verification. Projectors from the same generation often share the same mount, but placing an order based solely on a similar model is not worth the risk.

Throw Ratios for Different Model Series

The nominal throw ratio varies by series when the same 129-107109-XX HB Zoom is installed on the following series. Use the value for the actual projector series when selecting a lens.

IV. Three Checks Before Replacement

• Confirm the projector chipset and resolution. OEM lenses are designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the full panel, resulting in vignetting or edge light loss.
• Calculate the installation distance first. This lens has a nominal throw ratio of 2.03-2.71:1. Apply the table in Section 2 to your venue dimensions. Although a fixed-focus lens offers no adjustment margin, allow an additional 10–20 cm at each end for a zoom lens.
• Verify the mount and locking mechanism. The OEM lens is calibrated to the mount of this projector series. After installation, you must hear it click into the locked position. Image skew and soft edges are usually caused by incomplete locking, not by a fault in the lens itself.

If you are unsure, take one photo of each nameplate—the projector and the current lens—and send them to us for verification against the actual products.