AL-ML153MA Projector Lens for 11 Appotronics Models, 1.54–2.48:1

AL-ML153MA is a medium-to-long-throw lens for Appotronics engineering projectors, with a throw ratio of 1.54–2.48:1. It is compatible with 11 models across one model series. This article brings together the lens specifications, installation distances, model compatibility list, and key replacement considerations.

1. Lens Specifications

2. Converting Throw Ratio to Installation Distance

The throw ratio is the ratio of installation distance to image width. This is a zoom lens (1.54–2.48:1), so a given image size corresponds to a range of distances; installation anywhere within that range allows the image to be focused.

The distances above are clear measurements from the front of the lens to the screen and do not include clearance behind the chassis for heat dissipation or cable connections. Figures are calculated for a 16:10 image; actual distances should be verified on site and in accordance with the manual.

Image quality varies at the two ends of the zoom range: near the short end, the image is brighter and the edges are slightly softer; near the long end, the edges are sharper and brightness is slightly lower. Where the installation environment permits, the middle of the range is recommended. After installation, first find the sharpest setting using the focus ring, then fine-tune the lens shift—adjusting both variables at the same time makes precise alignment difficult.

3. Compatible Models (11 Models, Appotronics)

The table below is ordered from newest to oldest by model production date and includes each model's resolution, brightness, and factory-standard lens zoom ratio, enabling quick selection according to project requirements.

Common Features of These Models

The factory-standard lens throw ratios for these 11 models mostly vary by lens, as indicated in Depends on the lens. The 1.54–2.48:1 ratio featured in this article provides an adjusted focal range, enabling different image sizes at the same projection distance—this is the direct reason for replacing the lens. It also retains full lens-shift capability, allowing the image to remain properly aligned after the focal range is changed.

4. Three Checks Before Replacement

• Verify the panel size. The panel specifications for this model have not yet been recorded. Please send us a photo of the nameplate on the chassis for confirmation.
• Check the interfaces and locking mechanism. Interfaces are generally compatible within the same platform generation, but the locking tab positions differ between generations. If the image appears skewed or the edges are not sharp after installation, the lock is usually not fully engaged rather than the lens itself being faulty.
• Allow a margin for zoom. When measuring the distance, allow an additional 10–20 cm beyond the endpoints of the range, as transportation and installation variations may cause the lens to operate outside the range.

For models not on the list, the safest approach is to send us photos of the chassis nameplate and original lens for verification—same-generation platforms often share interfaces, but the risk of ordering based solely on a similar model designation is not worth taking.