Eiki AH-D22020 Fixed Standard-Throw Lens for EIP-UJT100

Eiki Original Lens AH-D22020 Fixed is an OEM optical accessory for Eiki professional projectors. It is a standard-throw lens with a throw ratio of 1.12:1. The manufacturer's compatibility list covers 1 model. Before installation, simply verify the projector model and panel size; adapter rings are unnecessary. The value of an OEM lens lies not in the extra figures in its specification sheet, but in the fact that it is factory-calibrated to the optical path and mount of that projector series. Once installed, the image circle, edge illumination, and focusing travel are all at their design values, with no need to use keystone correction to compensate for image quality.

I. Lens Specifications

These specifications are subject to the manufacturer's original specifications. For mechanical dimensions, flange distance, and mount type not listed in the specification table, please verify them with us using the exact projector model, as ordering 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 installation distance to image width. This OEM lens has a fixed focal length (1.12:1), so the installation distance varies linearly with image size, with no adjustment margin. Accurate measurements must be taken before installation.

These are the clear distances from the front surface of the lens to the screen and do not include clearance behind the projector for cooling and cable connections. They are calculated for a 16:10 image; actual distances should follow on-site measurements and the manufacturer's manual.

III. Compatible Models (1 Model)

The table below is based on 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 verify whether a model not on the list is compatible, please send us photos of the projector nameplate and the existing lens. Platforms of the same generation often share a mount, but ordering based only on a similar model is too risky.

Throw Ratios by Model Series

When the same AH-D22020 Fixed is installed on the series listed below, the nominal throw ratio varies. Use the value corresponding to the series of the actual projector when selecting a lens.

IV. Three Checks Before Replacement

• Confirm the projector's imaging chip and resolution. OEM lenses are designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the full area, causing vignetting or edge light loss after installation.
• Calculate the installation distance first. This lens has a nominal throw ratio of 1.12:1. Use the table in Section II to determine the distance for your installation site. A fixed-focal-length lens offers no adjustment margin, so even when using a zoom lens, allow an additional 10–20 cm at both ends of the zoom range.
• Verify the mount and locking mechanism. OEM lenses are calibrated to the mount of the relevant projector series. You must hear the lens click into a fully locked position after installation. Image skew or soft edges usually indicate that the lens has not locked fully, rather than 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. Verifying the actual hardware is the most reliable approach.