Vivitek D88-UST01 Ultra Short Zoom Standard-Throw Lens: 6 Compatible Models

Vivitek OEM Lens D88-UST01 Ultra Short Zoom is an OEM optical accessory for Vivitek engineering projectors. It is a standard-throw lens (Standard Throw) with a 0.77-0.97:1 throw ratio and is designed for the inch-sized panels of the DU/DW/DX engineering series. The OEM compatibility list covers 6 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 rows it adds to a specification sheet, but in the fact that it is factory-calibrated to the optical path and mount of the projector series. Once installed, the image circle, edge illumination, and focusing travel all meet their design values, so there is no need to use keystone correction to compensate for image quality.

1. Lens Specifications

Brand	Vivitek (Vivitek)
Lens Model	D88-UST01 Ultra Short Zoom
Throw Ratio	0.77-0.97:1
Product Type	Standard-throw lens (Standard Throw)
Compatible Panels	Inch-sized panels for the DU/DW/DX engineering series
Compatible Projector Models	6 models
Warranty	12 months; damage not caused by the user is eligible for after-sales service, based on the date on the shipping invoice

The above specifications are subject to the OEM specifications. For mechanical dimensions, flange distance, and mount type not shown in the table, please provide the projector model so we can verify the details. Placing an order based solely on a similar model carries the risk that the lens will not fit.

2. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of the installation distance to the image width. This OEM lens is a zoom lens (0.77-0.97:1), so each image size corresponds to a range of installation distances, and the lens can be focused anywhere within that range.

Image Size	Image Width	Required Installation Distance
100 inches	2.15 m	approx. 1.66 – 2.09 m
120 inches	2.58 m	approx. 1.99 – 2.50 m
150 inches	3.22 m	approx. 2.48 – 3.13 m
200 inches	4.30 m	approx. 3.31 – 4.17 m

These figures represent the clear distance from the front of the lens to the screen and do not include space behind the projector for cooling and cable connections. They are calculated for a 16:10 image; actual distances should be confirmed through on-site measurements and the manufacturer's manual.

Image quality differs at the two ends of the zoom range: near the close end, the image is brighter and the edges are slightly softer; near the far end, the edges are sharper and brightness is slightly lower. Where site conditions allow, use the middle of the range. After installation, first find the sharpest focus position on the focus ring, then fine-tune the lens shift.

3. Compatible Projector Models (6 Models)

The following table is taken from the OEM compatibility list. Brightness and resolution are populated from the model database; where the data is unavailable, “—” is shown, with no estimates made.

Model	Brightness	Resolution
DU6771-WH	6500 lumens	1920x1200
DU8090Z-BK	8000 lumens	1920x1200
DU8090Z-WH	8000 lumens	1920x1200
DU8190Z	10000 lumens	WUXGA,1920 x 1200
DU9057Z-BK	27000 lumens	1920x1200
DX6831	8000 lumens	1024x768

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

Throw Ratios by Model Series

The rated throw ratio varies by series when the same D88-UST01 Ultra Short Zoom is installed on the following series. When selecting a lens, use the value for the series of the actual projector.

Model Series	Throw Ratio
—	0.77-0.97:1

4. Three Checks Before Replacement

• The panel size must match. The D88-UST01 Ultra Short Zoom is designed for inch-sized panels for the DU/DW/DX engineering series. For a projector with a different panel size or resolution, the image circle and edge illumination will be compromised even if the lens fits the mount.
• Calculate the installation distance first. This lens has a rated throw ratio of 0.77-0.97:1. Use the table in Section 2 to apply it to your venue dimensions; although a fixed-focus lens offers no adjustment margin, allow an additional 10–20 cm at both ends of the zoom range.
• Verify the mount and locking mechanism. The OEM lens is calibrated to the mount of projectors in this series. After installation, you must hear the locking mechanism engage fully. 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 uncertain, send us one photo each of the projector nameplate and the existing lens nameplate. Verification against the actual equipment is the most reliable approach.