EIKI AH-CD20201 Fixed Short-Throw Lens: EIP-UHS100 EIP-XHS100 Compatible

Eiki Genuine Lens AH-CD20201 Fixed is a genuine optical accessory for Eiki engineering projectors. It is a short-throw lens with a 0.76:1 throw ratio. The factory compatibility list covers 2 models; before installation, simply verify the projector model and panel size—there is no need to force compatibility with an adapter ring. The value of a genuine lens lies not in the additional figures in the specification sheet, 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 focus travel all operate at their designed values, with no need to use keystone correction to compensate for image quality.

I. Lens Specifications

The above specifications are subject to the manufacturer's original specifications. For mechanical dimensions, flange distance, and mount type not shown in the specification table, contact us with the exact projector model. Ordering solely on the basis of a similar model carries the risk of an incompatible fit.

II. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of installation distance to image width. This genuine lens has a fixed focal length (0.76:1), so the installation distance varies linearly with image size and offers no adjustment margin. It must be measured accurately before installation.

These figures represent the clear distance from the front of the lens to the screen and do not include clearance for rear cooling and cable connections. They are calculated for a 16:10 image; in practice, rely on on-site measurements and the manufacturer's manual.

III. Compatible Models (2 Models)

The table below is taken from the manufacturer's compatibility list. Brightness and resolution are populated from the model database; unavailable values are shown as “—” and have not been estimated.

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

Throw Ratio by Model Series

The nominal throw ratio varies by series when the same AH-CD20201 Fixed is used. Select the value based on the series of the projector in use.

IV. Three Checks Before Replacement

• Confirm the projector imaging panel and resolution. The genuine lens is designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the full image area, resulting in vignetting or light loss at the edges.
• Calculate the installation distance first. This lens has a nominal throw ratio of 0.76:1; apply the table in Section II to the dimensions of your installation site. A fixed-focus lens offers no adjustment margin, and even zoom lenses require 10–20 cm of clearance at both ends.
• Check the mount and locking mechanism. The genuine lens is calibrated to the mount of the relevant projector series. After installation, you must hear the lock engage. Image skew or blurred edges are usually caused by incomplete locking, not by a fault in the lens itself.

If you are unsure, take one photo of the projector nameplate and one of the current lens nameplate and send them to us. Verification against the actual hardware is the most reliable approach.