Appotronics AL-EL080FR Fixed Short-Throw Lens Guide: 8 Compatible Models

Appotronics Original Lens AL-EL080FR Fixed is an original optical accessory for Appotronics business projectors. It is a short-throw (Short Throw) lens with a throw ratio of 0.80:1. The manufacturer’s compatibility list covers 8 models, so simply verify the projector model and panel size before installation—no need to improvise with an adapter ring. The value of an original lens lies not in a few extra specification figures, but in its factory calibration to the optical path and mount of the corresponding projector series: once installed, the image circle, edge illumination, and focusing travel all meet their design specifications, eliminating the need to compensate for image quality with keystone correction.

1. Lens Specifications

These specifications are subject to the manufacturer’s official specifications. For mechanical dimensions, flange distance, and mount type not listed above, please contact us with the projector model. Placing an order solely because a model appears similar carries the risk that the lens will not fit.

2. Calculating Installation Distance from Throw Ratio

A throw ratio is the ratio of installation distance to image width. This original lens has a fixed focal length (0.80:1), so the installation distance varies linearly with image size and offers no adjustment range. Accurate measurements are therefore essential before installation.

These figures represent the net distance from the front surface of the lens to the projection screen and do not allow for cooling clearance or cable connections at the rear of the projector. The calculations are based on a 16:10 aspect ratio; actual distances must be verified on site and according to the manufacturer’s manual.

3. Compatible Models (8 Models)

The following table is taken from the manufacturer’s compatibility list. Brightness and resolution are populated from the model database; entries that cannot be verified are shown as — without speculation.

For models not on the list, please send us photos of the projector nameplate and the existing lens so we can verify compatibility. Projector platforms from the same generation often share the same mount, but ordering based solely on a similar model is not worth the risk.

Throw Ratio by Model Series

The nominal throw ratio for the same AL-EL080FR Fixed lens varies across the series listed below. Select the value based on the series of the projector in use.

4. Three Checks Before Replacement

• Check the projector chip and resolution. Each original lens is designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the panel, resulting in vignetting or edge light loss 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. A fixed-focus lens has no adjustment margin, and even a zoom lens should have 10–20 cm of clearance at both ends.
• Verify the mount and locking mechanism. The original lens is calibrated to the mount used on that projector series. After installation, you must hear the lens lock into position. A skewed image or soft edges is usually caused by incomplete locking rather than a defect in the lens itself.

If you are unsure, take one photo of the projector nameplate and one of the nameplate on the existing lens and send them to us. Verification against the physical items is the safest approach.