Appotronics AL-ML070FR Short Zoom Standard-Throw Lens for 10 Models

Appotronics Original Lens AL-ML070FR Short Zoom is an original optical accessory for Appotronics professional projectors. It is a standard-throw lens (Standard Throw) with a throw ratio of 0.70-0.90:1. The official compatibility list covers 10 projector models. Before installation, simply verify the projector model and panel size without resorting to an adapter ring. The value of an original lens lies not in the extra rows of figures in the specification sheet, but in the fact that it is calibrated at the factory to the optical path and mount of that projector series. Once installed, the image circle, edge illumination, and focus travel all meet the design values, eliminating the need to rely on keystone correction to compensate for image-quality issues.

1. Lens Specifications

Brand	Appotronics (Appotronics)
Lens Model	AL-ML070FR Short Zoom
Throw Ratio	0.70-0.90:1
Product Type	Standard-throw lens (Standard Throw)
Compatible Projector Models	10 models
Warranty	12 months; damage not caused by the user is eligible for after-sales service, based on the date shown on the shipping documents

These specifications are subject to the manufacturer's official specifications. For mechanical dimensions, flange distance, and mount type not shown in the table, please contact us and provide the projector model. Ordering based only on a similar model risks finding that the lens does 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 (0.70-0.90:1), so each image size corresponds to a range of installation distances. Any installation distance within that range can achieve proper focus.

Image Size	Image Width	Required Installation Distance
100 inches	2.15 m	approx. 1.50 – 1.94 m
120 inches	2.58 m	approx. 1.81 – 2.32 m
150 inches	3.22 m	approx. 2.26 – 2.90 m
200 inches	4.30 m	approx. 3.01 – 3.87 m

These distances represent the clear distance from the front surface of the lens to the screen and do not include space behind the projector for cooling and cabling. The figures are calculated for a 16:10 image; actual values should be confirmed through on-site measurement and the manufacturer's manual.

Image quality varies at the two ends of the zoom range. Near the short-throw end, the image is brighter and the edges are slightly softer; near the long-throw end, the edges are sharper and the image is slightly dimmer. Where the installation environment permits, use the middle of the range. After installation, first find the sharpest setting on the focus ring, then fine-tune the lens shift.

3. Compatible Projector Models (10 Models)

The table below is taken from the official model compatibility list. Brightness and resolution have been populated from the model database; where the data is unavailable, “—” is shown, and no values have been inferred.

Model	Brightness	Resolution
AL-MH620A	—	—
AL-MH720A	—	—
AL-MK525A	—	—
AL-MK620A	—	—
AL-MK625A	—	—
AL-MU500A	—	—
AL-MU525A	—	—
AL-MU625A	—	—
MK650A	—	—
MK750A	—	—

To verify whether a model not on the list is compatible, send us photos of the projector nameplate and the existing lens. Platforms of the same generation often share the same mount, but the risk of ordering based solely on a similar model is not worth taking.

Throw Ratio by Projector Series

The rated throw ratio varies by series when the same AL-ML070FR Short Zoom is installed on the models listed below. Select the value based on the series of the projector in use.

Projector Series	Throw Ratio
—	0.70-0.90:1

4. Three Checks Before Replacement

• Confirm the projector imaging chip and resolution. Original lenses are designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the full image area, resulting in vignetting or light loss at the edges.
• Calculate the installation distance first. This lens has a rated throw ratio of 0.70-0.90:1. Use the table in Section 2 to match your installation site's dimensions. A fixed-focus lens provides no adjustment margin, and even a zoom lens should leave 10–20 cm of margin at both ends of the range.
• Verify the mount and locking mechanism. The original lens is calibrated to the mount used on that projector series. You should hear it click into the locked position after installation. Image misalignment or soft edges usually results from incomplete locking rather than a defect in the lens itself.

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