Christie 163-153100-XX Zoom Long-Throw Lens Overview: M 4K25 RGB Compatibility

Christie Original Lens 163-153100-XX Zoom is an OEM optical accessory for Christie engineering projectors. It is a long-throw (Long Throw) lens with a throw ratio of 1.87-2.56:1. The factory compatibility list covers 1 model. Before installation, simply verify the projector model and panel size; there is no need to improvise with adapter rings. The value of an OEM lens lies not in the additional figures in its specification sheet, but in the fact that it is calibrated at the factory to the optical path and mount of the relevant projector series. Once installed, the image circle, edge illumination, and focus travel all operate at their designed values, eliminating the need to use keystone correction to compensate for image quality.

I. Lens Specifications

The above specifications are subject to the original manufacturer’s specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please contact us with the projector model for verification. Ordering directly based on 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 installation distance to image width. This OEM lens is a zoom lens (1.87-2.56:1), so a given image size corresponds to a range of installation distances. It can be focused at any position within that range during installation.

The values above represent the clear distance from the front surface of the lens to the screen and do not include space for cooling and cable connections at the rear of the projector. They are calculated for a 16:10 image; actual measurements and the manufacturer’s manual take precedence.

Image quality differs at the two ends of the zoom range: near the shorter-throw end, the image is brighter and the edges are slightly softer; near the longer-throw end, the edges are sharper and brightness decreases slightly. When the venue allows, it is recommended to use 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 (1 Model)

The following table is taken from the manufacturer’s compatibility list. Brightness and resolution are populated from the model database; values that cannot be retrieved are shown as “—” and are not estimated.

To determine whether a model outside the list can be used, send us photos of the projector nameplate and existing lens for verification. Platforms of the same generation often share the same mount, but the risk of ordering based on a similar model is not worth taking.

Throw Ratio by Projector Model Series

The nominal throw ratio differs when the same 163-153100-XX Zoom lens is installed on the following series. Select the value based on the series of the actual projector.

IV. Three Things to Confirm Before Replacement

• Confirm the projector chip and resolution. The OEM lens is designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the image, resulting in vignetting or edge light loss after installation.
• Calculate the installation distance first. This lens has a rated throw ratio of 1.87-2.56:1. Use the table in Section II to calculate the distance for your venue. Fixed-focus lenses offer no adjustment margin, while zoom lenses should still leave 10–20 cm at both ends.
• Verify the mount and locking mechanism. The OEM lens is calibrated to the mount of the relevant projector series, and you must hear the lock engage fully after installation. Skewed images or soft edges are usually caused by incomplete locking rather than a problem with 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. Verification against the actual items is the most reliable approach.