EIKI AH-CD20203 Zoom Standard Throw Projector Lens for EIP-UHS100 and EIP-XHS100

Eiki Original Lens AH-CD20203 Zoom is an original optical accessory for Eiki engineering projectors. It is a standard-throw lens (Standard Throw) with a throw ratio of 0.75-0.93:1. The official compatibility list covers 2 projector models, so before installation, simply verify the projector model and panel size—no adapter ring workaround is needed. The value of an original lens lies not in the extra figures it adds to a specification sheet, but in the fact that it is factory-calibrated to the optical path and lens mount of that projector series: once installed, image-circle coverage, edge illumination, and focus travel all meet their design specifications, with no need to use keystone correction to compensate for image quality.

I. Lens Specifications

The above specifications are based on the manufacturer's official specifications. Mechanical dimensions, flange distance, and lens-mount type are not listed in the specifications table. Please check them with us using the projector model as the reference; ordering solely because the model appears similar carries the risk of a lens that will not fit.

II. Converting Throw Ratio to Installation Distance

The throw ratio is the ratio of the installation distance to the image width. This OEM lens is a zoom lens (0.75-0.93:1), so a given image size corresponds to a range of distances; any position within that range can be brought into focus.

These figures represent the clear distance from the front surface of the lens to the screen and do not allow for ventilation at the rear of the projector or space for cable connections. They are calculated for a 16:10 image; in actual use, rely on on-site measurements and the manufacturer's manual.

Image quality varies between the two ends of the zoom range: toward the short end, the image is brighter and the edges slightly softer; toward the long end, the edges are sharper and brightness is slightly lower. Where the venue allows, it is recommended to position the lens near the middle of the range. After installation, first find the sharpest setting on the focus ring, then fine-tune the lens shift.

III. Compatible Models (2 Models)

The table below is taken from the manufacturer's official compatibility list. Brightness and resolution are populated from the model database; where the data cannot be obtained, “—” is shown rather than making an estimate.

To check whether a model outside the list is compatible, please send us photos of the projector nameplate and the existing lens. Platforms of the same generation often share the same lens mount, but ordering based on a similar model name is not worth the risk.

Throw Ratios Across Model Series

The rated throw ratio varies by projector series even when the same AH-CD20203 Zoom is installed. When selecting a lens, use the value corresponding to the series of the actual projector.

IV. Three Checks Before Replacement

• Confirm the projector's imaging panel and resolution. OEM lenses are designed for specific panel sizes. If the panel specifications differ, the image circle cannot be fully covered, causing vignetting or edge light loss after installation.
• Calculate the installation distance first. This lens has a rated throw ratio of 0.75-0.93:1. Use the table in Section II to calculate the distance for your site. Fixed-focus lenses provide no adjustment margin, and zoom lenses should also allow an extra 10–20 cm at both ends.
• Verify the lens mount and locking mechanism. The OEM lens is calibrated to the lens mount of that projector series and must be fully locked after installation; you should hear it click into place. A skewed image or soft edges are usually caused by incomplete locking, not by a problem with the lens itself.

If you are unsure, take one photo of the projector nameplate and one of the existing lens nameplate, then send them to us. Verification against the actual items is the safest approach.