Vivitek D98-69103 Ultra Long Zoom Lens Guide for DU9053Z-BK, DU9055Z-BK, DU9057Z-BK, DU9059Z

Vivitek Genuine Lens D98-69103 Ultra Long Zoom is an OEM optical accessory for Vivitek engineering projectors. It is a long-throw lens with a throw ratio of 6.90-10.30:1, designed for inch-sized panels in the DU/DW/DX engineering series. The factory compatibility list covers 4 models. Before installation, simply verify the projector model and panel size; no adapter-ring workaround is required. The value of a genuine lens lies not in the additional figures in its specification sheet, but in its factory calibration to the optical path and mount of the relevant projector series. Once installed, the image circle, edge illumination, and focus travel all match the design values, so keystone correction is not needed to compensate for image quality.

I. Lens Specifications

Brand	Vivitek (Vivitek)
Lens Model	D98-69103 Ultra Long Zoom
Throw Ratio	6.90-10.30:1
Product Type	Long-throw lens (Long Throw)
Compatible Panels	DU/DW/DX engineering series (inch-sized panels)
Compatible Models	4 models
Warranty	12 months; non-accidental damage may be handled through after-sales service, subject to the date on the shipping invoice

The above specifications are subject to the manufacturer's official specifications. For mechanical dimensions, flange distance, and mount type not listed in the specifications table, please provide the projector model so we can verify them. Ordering solely on the basis of a similar model carries the risk that the lens will not fit.

II. Calculating Installation Distance from Throw Ratio

A throw ratio is the ratio of the installation distance to the image width. This genuine lens is a zoom lens (6.90-10.30:1), so each image size corresponds to a range of installation distances. Any installation distance within that range can be brought into focus.

Image Size	Image Width	Required Installation Distance
100 inches	2.15 m	approx. 14.84 – 22.14 m
120 inches	2.58 m	approx. 17.80 – 26.57 m
150 inches	3.22 m	approx. 22.25 – 33.22 m
200 inches	4.30 m	approx. 29.67 – 44.29 m

These figures represent the clear distance from the front surface of the lens to the screen and do not include ventilation or cabling clearance behind the projector. They are calculated for a 16:10 image format; in practice, rely on on-site measurements and the manufacturer's manual.

Image quality varies at the two ends of the zoom range: at the near end, the image is brighter and the edges are slightly softer; at the far end, the edges are sharper and brightness decreases slightly. Where the venue allows, use the middle of the range. After installation, find the sharpest position using the focus ring, then fine-tune the lens shift.

III. Compatible Models (4 models)

The table below is taken from the factory compatibility list; brightness and resolution are populated from the model database. Where data cannot be obtained, it is marked “—” rather than estimated.

Model	Brightness	Resolution
DU9053Z-BK	21000 lumens	1920x1200
DU9055Z-BK	24000 lumens	1920x1200
DU9057Z-BK	27000 lumens	1920x1200
DU9059Z	30000 lumens	WUXGA,1920 x 1200

To check whether a model not on the list is compatible, send us photos of the projector nameplate and the existing lens. Platforms from the same generation often share the same mount, but ordering on the basis of a similar model is not worth the risk.

Throw Ratios by Model Series

When the same D98-69103 Ultra Long Zoom lens is installed on the series listed below, the nominal throw ratio varies. Use the value for the series of the projector you actually have when selecting a lens.

Model Series	Throw Ratio
—	6.90-10.30:1

IV. Three Checks Before Replacement

• The panel size must match. D98-69103 Ultra Long Zoom is designed for the inch-sized panels in the DU/DW/DX engineering series. Projectors with a different panel size or resolution may experience problems with the image circle and edge illumination, even if the lens fits the mount.
• Calculate the installation distance first. This lens has a rated throw ratio of 6.90-10.30:1. Use the table in Section II with the dimensions of your venue. A fixed-focus lens leaves no adjustment margin, and even a zoom lens 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 used on this projector series. After installation, you must hear the lock 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 unsure, take one photo of the projector nameplate and one of the existing lens nameplate, then send them to us. Verification against the actual hardware is the safest approach.