AL-EL080FR 0.8:1 Projector Lens for 13 Appotronics, Leroy & Aurora Models

AL-EL080FR is a short-throw lens for engineering projectors (Leli, Appotronics and Aurora), with a 0.8:1 throw ratio. It is compatible with 13 projector models in 1 model series. This article presents the lens specifications, installation distances, model compatibility list and key replacement considerations 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 lens has a fixed focal length (0.8:1), so the installation distance varies linearly with image size and offers no scope for adjustment. Accurate measurements are essential before installation.

These are the clear distances from the lens face to the projection screen, without allowing for rear chassis ventilation and cable-routing space. The figures are calculated for a 16:10 aspect ratio; actual distances must be confirmed through on-site measurements and the manual.

3. Compatible Models (13 Models: Leli, Appotronics and Aurora)

The table below is ordered by model production date, from newest to oldest, and includes each model's resolution, brightness and the zoom ratio of its standard lens, making it easy to identify suitable options for project requirements.

The zoom ratio refers to the zoom factor of the model's factory-supplied standard lens (upper limit of the standard throw-ratio range ÷ lower limit), not the zoom range of the lens featured in this article.

Common Features of These Models

The factory-supplied standard lenses for these 13 models generally have throw ratios of 1.42-2.64:1. The 0.8:1 ratio of the model featured here effectively changes the focal range, producing a different image size from the same projection distance—this is the direct reason for replacing the lens. It also preserves full shift capability, so the image can still be aligned after the focal range is changed.

4. Three Checks Before Replacement

• Verify the panel dimensions. Panel specifications for this model are not yet available in our records, so please send us a photo of the chassis nameplate for confirmation.
• Check the interface and locking mechanism. Interfaces are generally shared across models on the same platform generation, but the position of the locking latch varies between generations. If the image appears skewed or the edges are not sharp after installation, the latch is usually not fully engaged rather than the lens itself being faulty.
• A fixed-focal-length lens offers no zoom adjustment. Image size can only be changed by moving the projector, so the site dimensions must be measured accurately first, with an additional 10–20 cm allowed at the endpoints.

For models not on the list, the safest approach is to send us the chassis nameplate and a photo of the original lens for verification. Models from the same platform generation often share the same interface, but ordering solely because the model designations are similar carries unnecessary risk.