Optoma BX-DL080 Fixed Short Throw Lens: Compatible with 14 Models Including EH503, EH503e, EH505

Optoma Original Lens BX-DL080 Fixed is a genuine optical accessory for Optoma installation projectors, belonging to the Short Throw category, with a throw ratio of 0.77:1. The original compatibility list covers 14 projector models; before installation, simply verify against the projector model and panel size — no adapter rings needed. The value of an original lens isn't a few extra rows of numbers on a spec sheet, but that it is calibrated at the factory to the optical path and mount of that series' chassis: once installed, the image circle, edge illumination, and focus travel all match design values, so you don't need keystone correction to compensate for image quality.

1. Lens Specifications

The above specifications are subject to the original manufacturer's specifications. For mechanical dimensions, flange focal distance, and mount type not shown in the spec table, please verify with us against your projector model — ordering based on model similarity alone carries the risk of incompatibility.

2. Converting Throw Ratio to Installation Distance

Throw ratio is the ratio of installation distance to image width. This original lens is fixed-focal (0.77:1), so the installation distance changes linearly with image size and has no adjustment margin — it must be measured accurately before installation.

The above figures are the clear distance from the lens front to the screen, excluding rear ventilation and cabling space behind the projector. Calculated for 16:10 aspect ratio; actual values are subject to on-site measurement and the original manufacturer's manual.

3. Compatible Models (14)

The table below is taken from the original compatibility list; brightness and resolution are filled in from the model database, with "—" where unavailable — no speculation.

To check whether models outside this list are compatible, please send us photos of the projector nameplate and the existing lens for verification — same-generation platforms often share mounts, but ordering based on model similarity is a risk not worth taking.

Throw Ratio Across Model Series

The same BX-DL080 Fixed lens has different nominal throw ratios when installed on the following series; selection must use the value for the actual chassis series.

4. Three Things to Confirm Before Replacement

• Confirm the projector's chip and resolution. Original lenses are designed for specific panel sizes; with a different panel specification, the image circle cannot cover it, resulting in vignetting or edge light loss after installation.
• Calculate the installation distance first. This lens has a nominal throw ratio of 0.77:1 — apply it to your venue dimensions using the table in Section 2; fixed focal length has no margin, and even zoom lenses need 10–20 cm of clearance at both ends.
• Check the mount and locking. Original lenses are calibrated to that series' chassis mount; after installation you must hear the lock engage. Image skew and soft edges are usually caused by incomplete locking, not the lens itself.

If unsure, take a photo of the projector nameplate and the existing lens nameplate and send them to us — verification against the actual hardware is the safest approach.