Christie 140-145101-01 Long Zoom Lens: Compatible with Jazz 4K1600-JS, Jazz 4K2100-JS

Christie Original Lens 140-145101-01 Long Zoom is a genuine optical accessory for Christie engineering projectors, belonging to the long throw category, with a throw ratio of 8.64-12.96:1. The original compatibility list covers 4 projector models; before installation, simply verify against the projector model and panel size—no need to rely on adapter rings. The value of an original lens isn't in a few extra rows of numbers on a spec sheet, but in the fact that it is calibrated at the factory to the optical path and mount of that series' chassis: once installed, the image circle, edge illumination, and focus travel are all at their design values, with no need to compensate image quality via keystone correction.

I. Lens Specifications

Brand	Christie
Lens Model	140-145101-01 Long Zoom
Throw Ratio	8.64-12.96:1
Product Type	Long Throw
Compatible Models	4
Warranty	12 months; after-sales service available for non-human damage, based on the date on the shipping document

The above specifications are subject to the original manufacturer's specifications. For mechanical dimensions, flange focal distance, and mount type not shown in the spec table, please verify with us against your projector model—ordering based on model similarity alone carries the risk of incompatibility.

II. Converting Throw Ratio to Installation Distance

Throw ratio is the ratio of installation distance to image width. This original lens is a zoom lens (8.64-12.96:1), so the same image size corresponds to a range of distances; installation anywhere within this range will achieve focus.

Image Size	Image Width	Required Installation Distance
100 inches	2.15 m	Approx. 18.58 – 27.86 m
120 inches	2.58 m	Approx. 22.29 – 33.44 m
150 inches	3.22 m	Approx. 27.86 – 41.80 m
200 inches	4.30 m	Approx. 37.15 – 55.73 m

The above figures are the net distance from the lens face to the screen, excluding rear ventilation and cabling space behind the projector. Calculated for 16:10 aspect ratio; actual values are subject to on-site measurement and the original manufacturer's manual.

Image quality differs at the two ends of the zoom range: toward the near end the image is brighter with slightly softer edges; toward the far end the edges are sharper with slightly reduced brightness. Where space permits, it is recommended to land in the middle of the range; after installation, first find the sharpest position on the focus ring, then fine-tune the shift.

III. Compatible Models (4)

The table below is taken from the original compatibility list; brightness and resolution are filled in from the model database, with "—" where unavailable—no speculation.

Model	Brightness	Resolution
Jazz 4K1600-JS	—	—
Jazz 4K2100-JS	—	—
Jazz DWU1800-JS	—	—
Jazz DWU2400-JS	—	—

To determine whether models outside the list are usable, please send us photos of the projector nameplate and the existing lens for verification—same-generation platforms often share mounts, but ordering based on model similarity is a risk not worth taking.

Throw Ratios Across Model Series

The same 140-145101-01 Long Zoom installed on the following series does not have the same nominal throw ratio; selection must be based on the actual series of the projector.

Model Series	Throw Ratio
—	8.64-12.96:1

IV. Three Things to Confirm Before Replacement

• Confirm the projector's chip and resolution. Original lenses are designed for specific panel sizes; if the panel specifications differ, the image circle cannot cover the screen, resulting in vignetting or edge light loss after installation.
• Calculate the installation distance first. This lens has a nominal throw ratio of 8.64-12.96:1; apply it to your venue dimensions using the table in Section II. Prime lenses have no margin, and even zoom lenses should leave 10–20 cm at both ends.
• Verify the mount and locking. Original lenses are calibrated to the mount of that series' chassis; after installation, you must hear the lock click into place. Image skew and soft edges are mostly due to incomplete locking, not a problem with the lens itself.

If unsure, take a photo of the projector nameplate and the existing lens nameplate and send them to us—verification against the actual hardware is the safest approach.