Vivitek LNS-5STZ2 Semi Short Zoom Standard Throw Lens: Fits DU7295Z-BK, DU7295Z-WH

Vivitek OEM Lens LNS-5STZ2 Semi Short Zoom is an OEM optical accessory for Vivitek professional projectors. It is a standard-throw lens (Standard Throw) with a 1.25-1.60:1 throw ratio and is designed for DU/DW/DX professional-series panels, measured in inches. The factory compatibility list covers 2 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 of specifications, 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 designed values, so there is no need to use keystone correction to compensate for image-quality shortcomings.

I. Lens Specifications

These specifications are subject to the original manufacturer’s specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please contact us for verification based on the projector model. Ordering solely on the basis of 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 OEM lens is a zoom lens (1.25-1.60:1). For a given image size, it covers a range of installation distances, and it can be brought into focus anywhere within that range.

The distances above are clear measurements from the front surface of the lens to the screen and do not include space behind the projector for cooling and cable connections. The calculations are based on a 16:10 image; actual values should be confirmed by on-site measurement and in accordance with the factory 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 the brightness is slightly lower. Where the venue allows, use the middle of the range. After installation, first turn the focus ring to the sharpest setting, then fine-tune the lens shift.

III. Compatible Models (2 Models)

The table below is taken from the factory compatibility list. Brightness and resolution have been populated from the model database; where the data is unavailable, “—” is shown and no assumptions are made.

To verify whether a model outside the list can be used, please send us photos of the projector nameplate and the existing lens. Platforms from the same generation often share the same mount, but it is not worth taking the risk of ordering based solely on a similar model number.

Throw Ratio by Model Series

The rated throw ratio varies by series when the same LNS-5STZ2 Semi Short Zoom lens is installed on the following series. Select the value based on the series of the actual projector.

IV. Three Checks Before Replacement

• The panel size must match. LNS-5STZ2 Semi Short Zoom is designed for DU/DW/DX professional-series panels, measured in inches. For projectors with a different panel size or resolution, the image circle and edge illumination can be compromised even if the lens physically fits.
• Calculate the installation distance first. This lens has a rated throw ratio of 1.25-1.60:1. Use the table in Section II to calculate the distance for your venue. A fixed-focal-length lens offers no adjustment margin, and a zoom lens should also allow 10–20 cm of clearance at both ends.
• Verify the mount and locking mechanism. The OEM lens is calibrated to the mount on projectors in that series, and you must hear it lock into position after installation. A skewed image and soft edges are usually caused by incomplete locking, not by a problem with the lens itself.

If you are unsure, send us one photo of the projector nameplate and one of the existing lens nameplate. Verification against the actual hardware is the safest approach.