Christie 129-110103-XX HB Zoom Long-Throw Lens for Roadie 4K25, Roadie 4K35, Roadie 4K45

Christie OEM Lens 129-110103-XX HB Zoom is an original optical accessory for Christie engineering projectors. It is a long-throw (Long Throw) lens with a throw ratio of 5.06-7.88:1. The OEM compatibility list covers 3 models. Before installation, simply verify the projector model and panel size—no adapter ring workaround is needed. The value of an OEM lens lies not in the additional figures in its specifications, but in its factory calibration to the optical path and lens mount of the corresponding projector series. Once installed, image circle coverage, edge illumination, and focus travel all meet the design specifications, eliminating the need to compensate for image quality with keystone correction.

I. Lens Specifications

The above specifications are subject to the OEM specifications. For mechanical dimensions, flange distance, and mount type not listed in the specifications, please contact us with your projector model. Ordering based solely on a similar model carries the risk that the lens will not fit.

II. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of installation distance to image width. This OEM lens is a zoom lens (5.06-7.88:1), so the same image size corresponds to a range of installation distances. It can be focused at any point within this range.

These figures represent the clear distance from the front surface of the lens to the screen and do not include space for rear housing ventilation and cable connections. They are calculated for a 16:10 aspect ratio; actual measurements and the OEM manual take precedence.

Image performance differs at the two ends of the zoom range. Near the close end, the image is brighter and the edges are slightly softer; near the far end, the edges are more defined and the brightness is slightly lower. Where site conditions allow, the middle of the range is recommended. After installation, find the sharpest position on the focus ring, then fine-tune the lens shift.

III. Compatible Models (3 Models)

The following table is taken from the OEM compatibility list. Brightness and resolution are populated from the model database; unavailable specifications are marked with "—" and are not estimated.

To determine whether a model outside this list is compatible, send us a photo of the projector nameplate and the existing lens. Projector platforms of the same generation often share lens mounts, but the risk of ordering based solely on a similar model is not worth taking.

Throw Ratios by Projector Model Series

When the same 129-110103-XX HB Zoom lens is installed on the series listed below, the nominal throw ratios differ. Select the value based on the series of the actual projector.

IV. Three Checks Before Replacement

• Confirm the projector chip and resolution. Each OEM lens is designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the panel, resulting in vignetting or edge light loss after installation.
• Calculate the installation distance first. This lens has a nominal throw ratio of 5.06-7.88:1. Use the table in Section 2 to calculate the distance for your site dimensions. Fixed-focus lenses provide no adjustment margin, and zoom lenses also require 10–20 cm of clearance at both ends of the range.
• Verify the mount and locking mechanism. Each OEM lens is calibrated to the lens mount of the corresponding projector series. After installation, you must hear the lens lock into place. A skewed image or soft edges are usually caused by incomplete locking rather than a problem with the lens itself.

If you are unsure, photograph the projector nameplate and the current lens nameplate and send both to us. Matching the actual products is the safest approach.