Appotronics EL470TZ Zoom Long-Throw Lens for 10 Models

Genuine Appotronics EL470TZ Zoom Lens is a factory-supplied optical accessory for Appotronics engineering projectors. It is a Long Throw lens with a throw ratio of 4.68-7.96:1. The manufacturer's official compatibility list covers 10 projector models. Before installation, simply verify the projector model and panel size; no adapter ring workaround is needed. The value of a genuine lens lies not in the extra figures in the specification table, but in its factory calibration to the optical path and mount of that model series. Once installed, the image circle, edge illumination, and focusing travel are all at their design values, eliminating the need to use keystone correction to compensate for image quality.

I. Lens Specifications

The above specifications are subject to the manufacturer's official specifications. For mechanical dimensions, flange distance, and mount type not shown in the specification table, please contact us with your 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

The throw ratio is the ratio of installation distance to image width. This genuine lens is a zoom lens (4.68-7.96:1), so a given image size corresponds to a range of installation distances, and the lens can focus anywhere within that range.

These figures represent the clear distance from the front surface of the lens to the screen and do not allow for ventilation and cable-routing space behind the projector. They are calculated for a 16:10 image aspect ratio; actual values must be verified through on-site measurement and in accordance with the manufacturer's manual.

Image quality differs at the two ends of the zoom range: toward the near end, the image is brighter and the edges are slightly softer; toward the far end, the edges are sharper and brightness is slightly lower. Where the venue allows, we recommend using the middle of the range. After installation, first turn the focus ring to the sharpest setting, then fine-tune the lens shift.

III. Compatible Models (10 Models)

The following table is taken from the manufacturer's official compatibility list. Brightness and resolution are populated from the model database; where data is unavailable, “—” is shown rather than estimated.

To determine whether a model outside the list is compatible, please send us photos of the projector nameplate and the existing lens for verification. Same-generation platforms often share the same mount, but the risks of ordering based on a similar model designation are not worth taking.

Throw Ratio by Model Series

The rated throw ratio varies by model series when the same EL470TZ Zoom lens is installed. Select the value according to the series of the actual projector.

IV. Three Checks Before Replacement

• Confirm the projector's imaging chip and resolution.The genuine lens is designed for a specific panel size. If the panel specification differs, the image circle cannot cover the full image, causing vignetting or edge light loss after installation.
• Calculate the installation distance first.This lens has a rated throw ratio of 4.68-7.96:1. Use the table in Section II to calculate the distance for your venue. A fixed-focus lens offers no adjustment margin, while a zoom lens still requires 10–20 cm of clearance at both ends of the range.
• Verify the mount and locking mechanism.The genuine lens is calibrated to the mount of that model series, and you must hear it lock into place after installation. A skewed image or soft edges are usually caused by an incomplete lock, not by a problem with the lens itself.

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