Vivitek VL903G Wide Fixed Short-Throw Lens Guide: D5000 D5180HD H5080 H5082 H5085

Vivitek Genuine Lens VL903G Wide Fixed is an OEM optical accessory for Vivitek engineering projectors. It has a short throw ratio of 0.80:1 and is designed for D/H Engineering/Cinema Series panels with inch-based image sizes. The factory compatibility list covers 5 models. Before installation, simply verify the projector model and panel size; there is no need to make do with adapter rings. The value of an OEM lens lies not in the extra figures in the specification sheet, but in the fact that it is calibrated at the factory to the optical path and mount of that projector series. Once installed, the image circle, edge illumination, and focus travel are all at their design values, so keystone correction is not needed to compensate for image quality.

I. Lens Specifications

The above specifications are subject to the factory specifications. For mechanical dimensions, flange distance, and mount type not shown in the specification table, please provide your exact projector model when contacting us. Ordering based solely 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 has a fixed focal length (0.80:1), so its installation distance varies linearly with image size and offers no adjustment margin. Measurements must be accurate before installation.

These figures represent the net distance from the front surface of the lens to the screen and do not include clearance behind the projector for heat dissipation and cable connections. They are based on a 16:10 aspect ratio; actual values are subject to on-site measurements and the factory manual.

III. Compatible Projector Models (5 Models)

The following table is taken from the factory compatibility list. Brightness and resolution are populated from the model database; unavailable entries are shown as “—” without speculation.

To check whether a model outside the list is compatible, please send us photos of the projector nameplate and the existing lens. Projector platforms from the same generation often share the same mount, but the risks of ordering based only on a similar model outweigh the convenience.

Throw Ratio by Projector Series

The nominal throw ratio varies by series when the same VL903G Wide Fixed lens is used. Select the applicable value according to the series of the actual projector.

IV. Three Checks Before Replacement

• Ensure the panel size matches.VL903G Wide Fixed is designed for D/H Engineering/Cinema Series panels with inch-based image sizes. Even if the mount fits, projectors with a different panel size or resolution may experience problems with the image circle and edge illumination.
• Calculate the installation distance first.The nominal throw ratio of this lens is 0.80:1. Use the table in Section II to calculate the distance for your installation site. A fixed-focal-length lens offers no adjustment margin, and even a zoom lens should have 10–20 cm reserved at both ends.
• Verify the mount and locking mechanism.The OEM lens is calibrated to the mount of projectors in this series. You must hear the lens lock into place after installation. A skewed image or soft edges usually indicate that the lens is not fully locked rather than a problem with the lens itself.

If you are unsure, send us one photo each of the projector nameplate and the existing lens nameplate. Comparing the actual hardware is the most reliable approach.