AF123MA1 Lens 1.23–1.97:1 for 5 Appotronics Models: AL-FU715, FU10K, FU805, FU705, FU905

AF123MA1 is a medium-to-long-throw lens for installation projectors (Appotronics), with a 1.23–1.97:1 throw ratio. It is compatible with 5 models across 1 model series. This article presents the lens specifications, installation distances, model compatibility list, and replacement considerations all in one place.

1. Lens Specifications

2. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of the installation distance to the image width. This is a zoom lens (1.23–1.97:1), so a given image size corresponds to a range of distances; it can achieve focus anywhere within that range during installation.

These figures represent the clear distance from the front of the lens to the screen and do not account for rear housing ventilation or cable connections. The values are calculated for a 16:10 image; actual values should be confirmed through on-site measurements and the manual.

Image quality varies at either end 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 brightness decreases slightly. When site conditions allow, use the middle of the range. After installation, first find the sharpest position using the focus ring, then fine-tune the lens shift—adjusting both at the same time makes precise alignment difficult.

3. Compatible Models (5 Models, Appotronics)

The table below is ordered from newest to oldest by model launch date and lists each model’s resolution, brightness, and factory-lens zoom ratio, making it easy to identify the right option for your project requirements.

Common Features of These Models

The factory-standard lenses for these 5 models generally have throw ratios listed as Depends on the lens. The 1.23–1.97:1 ratio of the model discussed here effectively provides a different focal-length range, allowing different image sizes at the same projection distance—this is the direct reason for replacing the lens. It also retains full lens-shift capability, so the image can still be precisely aligned after the focal range is adjusted.

4. Three Checks Before Replacement

• Verify the panel dimensions. Panel specifications for this model have not yet been added to our database. Please send us a photo of the nameplate on the projector for confirmation.
• Check the interface and locking mechanism. Interfaces are generally compatible across platforms of the same generation, but the locking latch position differs between generations. If the image is skewed or the edges are not sharp after installation, the latch is usually not fully engaged; this is generally not an issue with the lens itself.
• Allow some zoom margin. When measuring the distance, use the range endpoints and allow an additional 10–20 cm, as transportation and installation tolerances may place the lens outside the range.

For compatibility with a model not listed here, the safest approach is to send us photos of the projector nameplate and original lens for verification—platforms of the same generation often share interfaces, but the risk of ordering based on a similar model number is not worth taking.