Appotronics AL-ML154MA Long Zoom Lens for 8 Projector Models

Genuine Appotronics Lens AL-ML154MA Long Zoom is an original optical accessory for Appotronics professional projectors. It is a long-throw lens with a throw ratio of 1.54-2.48:1. The manufacturer's compatibility list covers 8 models; 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 specifications it adds, but in its factory calibration 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, eliminating the need for keystone correction to compensate for image quality.

1. Lens Specifications

The specifications above are subject to the manufacturer's official specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please check with us using the projector model. Ordering based solely on a similar model carries the risk that the lens will not fit.

2. Converting Throw Ratio to Installation Distance

The throw ratio is the ratio of the installation distance to the image width. This original lens is a zoom lens (1.54-2.48:1), so a given image size corresponds to a range of distances; during installation, any position within that range can be brought into focus.

These distances are clear measurements from the front of the lens to the screen and do not account for rear housing ventilation or cable connection space. The values are based on a 16:10 image; actual distances must be confirmed through on-site measurements and the manufacturer's manual.

Image quality varies at the two ends of the zoom range: near the close end, the image is brighter and the edges are slightly softer; near the far end, the edges are sharper and brightness decreases slightly. Where the venue allows, use the middle of the range. After installation, first find the sharpest position on the focus ring, and then fine-tune the lens shift.

3. Compatible Models (8 Models)

The table below is taken from the manufacturer's compatibility list. Brightness and resolution are populated from the model database; entries that cannot be verified are marked “—” rather than estimated.

For models not listed, send us photos of the projector nameplate and current lens for verification. Same-generation platforms often share mounts, but the risk of ordering based on a similar model is not worth taking.

Throw Ratio by Projector Series

The nominal throw ratio of the same AL-ML154MA Long Zoom varies by projector series. Use the value for the series of the projector in use when selecting a lens.

4. Three Checks Before Replacement

• Confirm the projector chip and resolution. Each original lens is designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the full panel, resulting in vignetting or edge light falloff after installation.
• Calculate the installation distance first. This lens has a rated throw ratio of 1.54-2.48:1. Use the table in Section 2 to match the dimensions of your installation site. A fixed-focus lens offers no adjustment margin, and even a zoom lens should allow an additional 10–20 cm at both ends.
• Verify the mount and locking mechanism. Each original lens is calibrated to the mount of its projector series. After installation, you must hear the lens lock securely in place. A skewed image and soft edges are usually caused by incomplete locking, not by the lens itself.

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