Appotronics Original Lens AL-DL080FR Short Fixed is an original optical accessory for Appotronics engineering projectors, featuring a short-throw (Short Throw) design with a throw ratio of 0.80:1. The factory compatibility list covers 5 models; before installation, simply verify the projector model and panel size, with no need to resort to adapter rings. The value of an original lens lies not in the extra figures on a specification sheet, but in the fact that it is factory-calibrated to the optical path and mount of that model series: once installed, the image circle, edge illumination, and focus travel all match the design values, with no need to compensate for image quality through keystone correction.
I. Lens Specifications
| Brand | Appotronics (Appotronics) |
| Lens Model | AL-DL080FR Short Fixed |
| Throw Ratio | 0.80:1 |
| Product Type | Short-throw (Short Throw) |
| Compatible Models | 5 models |
| Warranty | 12 months; damage not caused by the user is covered by after-sales service, based on the date shown on the shipping document |
The above specifications are subject to the original manufacturer's specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please contact us with the projector model for verification. Ordering directly based on a similar model carries the risk that the lens will not fit.
II. Calculating Installation Distance from Throw Ratio
A throw ratio is the ratio of the installation distance to the image width. This original fixed-focus lens (0.80:1) has an installation distance that varies linearly with image size, with no adjustment margin, so accurate measurements are essential before installation.
| Image Size | Image Width | Required Installation Distance |
|---|---|---|
| 100 inches | 2.15 m | approx. 1.72 m |
| 120 inches | 2.58 m | approx. 2.06 m |
| 150 inches | 3.22 m | approx. 2.58 m |
| 200 inches | 4.30 m | approx. 3.44 m |
The distances above are the clear distances from the front surface of the lens to the screen and do not include space behind the projector for cooling or cable connections. These values are calculated for a 16:10 image; actual distances should be verified on site and according to the original manufacturer's manual.
III. Compatible Models (5 Models)
The table below is taken from the factory compatibility list. Brightness and resolution are populated from the model database; where data is unavailable, “—” is shown rather than making assumptions.
| Model | Brightness | Resolution |
|---|---|---|
| AL-DH620A | — | — |
| AL-DH750A | — | — |
| AL-DU735A | — | — |
| AL-DU835A | — | — |
| AL-DU935A | — | — |
For compatibility with models outside the list, please send us photos of the projector nameplate and the existing lens for verification—platforms from the same generation often share the same mount, but ordering based on a similar model is not worth the risk.
Throw Ratios for Different Model Series
The nominal throw ratio of the same AL-DL080FR Short Fixed lens differs across the series listed below, so select the value based on the series of your actual projector.
| Model Series | Throw Ratio |
|---|---|
| — | 0.80:1 |
IV. Three Checks Before Replacement
- Confirm the projector chip and resolution. Original lenses are designed for a specific panel size. When the panel specifications differ, the image circle cannot cover the full image, resulting in vignetting or light falloff at the edges after installation.
- Calculate the installation distance first. This lens has a nominal throw ratio of 0.80:1; use the table in Section 2 to calculate the distance for your installation site. Since it is fixed-focus, there is no adjustment margin; even with a zoom lens, allow 10–20 cm at both ends of the zoom range.
- Verify the mount and locking mechanism. The original lens is calibrated to the mount of that model series and must audibly lock into place after installation. A skewed image or soft edges usually indicate that the lens has not fully locked in place, rather than a problem with 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 safest approach.
Get a Solution Consultation
For Zorsika's recommendations on selecting the original AL-DL080FR Short Fixed lens, project configuration advice, or a complete compatibility list, contact us through the following channels:
| Contact Number | 0086-20-38551187 |
| sales@zorsika.com | |
| Working hours: Monday to Friday 9:00-18:00 | |
The lens model, original manufacturer part number, and compatible models in this article are sourced from the original manufacturer's compatibility list and Zorsika's product database. The data is continuously updated; actual quotations and confirmations take precedence.