Vivitek D98-0912 Ultra Wide Zoom Standard Throw Lens Overview for DU9800Z-BK DU9900Z-BK

Vivitek Original Lens D98-0912 Ultra Wide Zoom is an original optical accessory for Vivitek engineering projectors. It is a standard-throw lens with a 0.90-1.20:1 throw ratio for DU/DW/DX engineering-series inch panels. The factory compatibility list covers 2 models; before installation, simply verify the projector model and panel size—no adapter rings needed. The value of an original lens lies not in the extra rows of figures in its specification sheet, but in the fact that it is calibrated at the factory to the optical path and mount of the relevant projector series. Once installed, the image circle, edge illumination, and focusing travel all match the design values, so there is no need to use keystone correction to compensate for image quality.

I. Lens Specifications

These specifications are subject to the factory specifications. For mechanical dimensions, flange distance, and mount type not shown in the specification table, please contact us with the projector model. Ordering based solely on a similar model carries the risk that the lens will not fit.

II. Throw Ratio and Installation Distance

The throw ratio is the ratio of the installation distance to the image width. This original lens is a zoom lens (0.90-1.20:1), so each image size corresponds to a distance range. It can achieve focus anywhere within that range during installation.

These figures represent the clear distance from the front surface of the lens to the screen and do not include clearance for rear cooling and cable connections. They are calculated for a 16:10 frame; actual values should be verified on site and against the factory manual.

Image performance differs at the two ends of the zoom range: the image is brighter with slightly softer edges near the close end, while the edges are sharper but slightly dimmer near the wide end. Where installation conditions allow, target the middle of the range. After installation, first use the focus ring to find the sharpest setting, then fine-tune the lens shift.

III. Compatible Models (2 models)

The following table is taken from the factory compatibility list. Brightness and resolution are populated from the model database; unavailable values are marked as "—", with no assumptions made.

To check compatibility with a model not on the list, send us photos of the projector nameplate and the existing lens. Same-generation platforms often share mounts, but the risk of ordering based on a similar model is not worth taking.

Throw Ratio by Projector Series

The rated throw ratio varies by series when the same D98-0912 Ultra Wide Zoom is installed on the series listed below, so use the value for the series of the actual projector when selecting.

IV. Three Checks Before Replacement

• The panel size must match. D98-0912 Ultra Wide Zoom is designed for DU/DW/DX engineering-series inch panels. Projectors with different panel sizes or resolutions may have image-circle and edge-illumination problems even if the lens mount fits.
• Calculate the installation distance first. This lens has a rated throw ratio of 0.90-1.20:1; use the table in Section II to calculate it for your venue. A fixed-focus lens offers no adjustment margin, and even a zoom lens requires 10–20 cm of margin at both ends of the range.
• Verify the mount and locking mechanism. The original lens is calibrated to the mount used on this projector series. After installation, you must hear it lock fully into place. A skewed image and soft edges are usually caused by incomplete locking, not a problem with the lens itself.

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