Eiki AH-EC22030 Zoom Standard-Throw Lens for EK-1000LU EK-1100LU EK-1300LU EK-850LU EK-900LU

Eiki Genuine Lens AH-EC22030 Zoom is an OEM optical accessory for Eiki professional projectors. It is a standard-throw lens (Standard Throw) with a throw ratio of 0.79-1.11:1. The manufacturer's compatibility list covers 5 models. Before installation, simply verify the projector model and panel size; no adapter-ring workaround is needed. The value of an OEM lens lies not in the additional rows of specifications, but in its factory calibration to the optical path and lens mount of the corresponding projector series. Once installed, the image circle, edge illumination, and focusing travel all match the design values, eliminating the need for keystone correction to compensate for image quality.

I. Lens Specifications

Brand	Eiki (Eiki)
Lens Model	AH-EC22030 Zoom
Throw Ratio	0.79-1.11:1
Product Type	Standard Throw (Standard Throw)
Compatible Models	5 models
Warranty	12 months; after-sales service is available for damage not caused by the user, based on the date shown on the shipping documents

The above specifications are subject to the manufacturer's official specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please provide your projector model so we can verify them with you. 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 the installation distance to the image width. This genuine zoom lens has a throw ratio of 0.79-1.11:1, so a given image size corresponds to a range of installation distances. The lens can focus at any position within that range.

Image Size	Image Width	Required Installation Distance
100 inches	2.15 m	approx. 1.70 – 2.39 m
120 inches	2.58 m	approx. 2.04 – 2.86 m
150 inches	3.22 m	approx. 2.55 – 3.58 m
200 inches	4.30 m	approx. 3.40 – 4.77 m

These figures represent the clear distance from the front of the lens to the screen and do not account for ventilation clearance or cable-management space behind the projector. They are calculated for a 16:10 image; actual distances are subject to on-site measurement and the manufacturer's manual.

Image quality differs at the two ends of the zoom range: the image is brighter with slightly softer edges near the short end, while the edges are sharper with slightly lower brightness near the long end. Where installation conditions allow, use the middle of the range. After installation, find the sharpest position using the focus ring, then fine-tune the lens shift.

III. Compatible Models (5 Models)

The following table is taken from the manufacturer's compatibility list. Brightness and resolution are listed according to the model database; unavailable values are marked “—” and are not estimated.

Model	Brightness	Resolution
EIKI EK-1000LU	—	—
EIKI EK-1100LU	—	—
EIKI EK-1300LU	—	—
EIKI EK-850LU	—	—
EIKI EK-900LU	—	—

To check whether a model not on the list is compatible, send us photographs of the projector nameplate and current lens for verification. Platforms of the same generation often share the same mount, but ordering based on a similar model is not worth the risk.

Throw Ratios Across Projector Series

The rated throw ratio varies by series when the same AH-EC22030 Zoom lens is used. Select the value for the series of the actual projector.

Projector Series	Throw Ratio
—	0.79-1.11:1

IV. Three Checks Before Replacement

• Confirm the projector imaging panel and resolution. The OEM lens is designed for a specific panel size. If the panel specifications differ, the image circle cannot provide full coverage, resulting in vignetting or light loss at the edges after installation.
• Calculate the installation distance first. This lens has a rated throw ratio of 0.79-1.11:1. Apply the table in Section II to the dimensions of your installation space. Fixed-focus lenses offer no adjustment margin, while zoom lenses still require a 10–20 cm margin at both ends of the range.
• Verify the mount and locking mechanism. The OEM lens is calibrated to the mount used on that projector series. You must hear it lock into place after installation. A skewed image or soft edges are usually caused by incomplete locking rather than a lens defect.

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