Vivitek LNS-5SZ12 Semi Short Zoom Standard Throw Lens: Compatible with DU7090Z, DU7095Z-BK

Vivitek Original Lens LNS-5SZ12 Semi Short Zoom is a genuine optical accessory for Vivitek engineering projectors. It belongs to the standard throw category, with a throw ratio of 1.25-1.60:1, and corresponds to DU/DW/DX engineering series panel sizes. The original compatibility list covers 8 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: once installed, the image circle, edge illumination, and focus travel are all at design values, so you don't need keystone correction to compensate for image quality.

1. Lens Specifications

Brand	Vivitek (Vivitek)
Lens Model	LNS-5SZ12 Semi Short Zoom
Throw Ratio	1.25-1.60:1
Product Type	Standard Throw
Compatible Panel	DU/DW/DX engineering series inches
Covered Models	8
Warranty	12 months; non-human damage is eligible for after-sales service, based on the date on the shipping document

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 the projector model; ordering based on similar model numbers 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 a zoom lens (1.25-1.60:1), so the same image size corresponds to a range of distances; as long as installation falls within this range, focus can be achieved.

Image Size	Image Width	Required Installation Distance
100 inches	2.15 m	Approx. 2.69 – 3.44 m
120 inches	2.58 m	Approx. 3.22 – 4.13 m
150 inches	3.22 m	Approx. 4.03 – 5.16 m
200 inches	4.30 m	Approx. 5.38 – 6.88 m

The above are clear distances 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.

Image quality differs at the two ends of the zoom range: toward the near end the image is brighter with slightly softer edges; toward the far end the edges are sharper with slightly reduced brightness. Where space permits, it is recommended to land in the middle of the range; after installation, first find the sharpest position on the focus ring, then fine-tune the shift.

3. Compatible Models (8)

The table below is taken from the original compatibility list; brightness and resolution are filled in from the model database, with "—" where unavailable, without speculation.

Model	Brightness	Resolution
DU7090Z	6000 lumens	1920x1200
DU7095Z-BK	6500 lumens	1920x1200
DU7095Z-WH	6500 lumens	1920x1200
DU7098Z-BK	7000 lumens	1920x1200
DU7098Z-WH	7000 lumens	1920x1200
DU7195Z	8000 lumens	1920x1200
DU7295Z-BK	9000 lumens	1920x1200
DU7295Z-WH	9000 lumens	1920x1200

For models not on the list, please send us photos of the projector nameplate and the existing lens for verification—same-generation platforms often share mounts, but ordering based on similar model numbers is not worth the risk.

Throw Ratios Across Model Series

The same LNS-5SZ12 Semi Short Zoom installed on the following series does not have the same nominal throw ratio; selection must be based on the actual series of the projector.

Model Series	Throw Ratio
—	1.25-1.60:1

4. Three Things to Confirm Before Replacement

• Panel size must match. The LNS-5SZ12 Semi Short Zoom is designed for DU/DW/DX engineering series inch panels. Machines with different panel sizes or resolutions may have image circle and edge illumination issues even if the mount fits.
• Calculate installation distance first. This lens has a nominal throw ratio of 1.25-1.60:1; use the table in Section 2 to map it to your venue dimensions. Prime lenses have no margin, and even zoom lenses should leave 10–20 cm at both ends.
• Check the mount and locking. The original lens is calibrated to that series' mount; after installation you must hear it lock into place. Image skew and soft edges are mostly due to 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.