Eiki AH-D22030 Zoom Standard-Throw Projector Lens Review: EIP-UJT100 Compatibility

Eiki Original Lens AH-D22030 Zoom is an OEM optical accessory for Eiki professional projectors. It is a standard-throw lens (Standard Throw) with a throw ratio of 1.39-1.87:1. The official compatibility list covers 1 model. Before installation, simply verify the projector model and panel size; there is no need to resort to adapter rings. The value of an OEM lens lies not in the additional figures on a specification sheet, but in the fact that it is calibrated at the factory to the optical path and lens mount of that projector series. Once installed, the image circle, edge illumination, and focusing travel all meet the designed values, with no need to use keystone correction to compensate for image quality.

I. Lens Specifications

These specifications are subject to the manufacturer's official specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please contact us with the projector model. Placing an order 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 the installation distance to the image width. This OEM lens is a zoom lens (1.39-1.87:1), so a given image size corresponds to a range of installation distances. The lens can focus at any point within that range during installation.

These figures represent the clear distance from the front of the lens to the screen and do not include space behind the projector for ventilation and cable connections. They are calculated for a 16:10 aspect ratio; actual distances should be verified on site and in accordance with the manufacturer's manual.

Image quality differs at the two ends of the zoom range: at the short-throw end, the image is brighter and the edges are slightly softer; at the long-throw end, the edges are sharper and brightness is slightly reduced. Where site conditions allow, it is recommended to position the lens in the middle of the range. After installation, find the sharpest setting using the focus ring, and then fine-tune the lens shift.

III. Compatible Models (1 unit)

The table below is taken from the official compatibility list. Brightness and resolution are populated from the model database; where the data is unavailable, “—” is shown, with no assumptions made.

For compatibility with models outside the list, please send us photos of the projector nameplate and the existing lens for verification. Same-generation platforms often share the same mount, but placing an order based on a similar model is not worth the risk.

Throw Ratios for Different Projector Model Series

The nominal throw ratio varies by projector series when the same AH-D22030 Zoom is installed. When selecting a lens, use the value for the series of the projector in question.

IV. Three Checks Before Replacement

• Confirm the projector imaging chip and resolution. OEM lenses are designed for specific panel sizes. If the panel specifications differ, the image circle will not cover the full image, resulting in vignetting or light loss at the edges after installation.
• Calculate the installation distance first. The nominal throw ratio of this lens is 1.39-1.87:1. Use the table in Section 2 to calculate the distance for your installation site. Fixed-focus lenses offer no adjustment margin, and zoom lenses should also allow 10–20 cm at both ends of the range.
• Verify the mount and locking mechanism. The OEM lens is calibrated to the lens mount of that projector series. After installation, you must hear the lens click into the locked position. Image skew and soft edges are usually caused by incomplete locking rather than a problem with the lens itself.

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