WA103 Projector Lens 0.75:1 for 2 Sonnoc Engineering Projectors incl. SNP-LU21K, LU18K

WA103 is a short-throw lens for 0.96-inch panels (Sony), with a 0.75:1 throw ratio and lens shift. It is compatible with 2 projector models from 1 model series. This article presents the lens specifications, installation distance, model compatibility list, and replacement considerations in one place.

1. Lens Specifications

Lens-shift capability is the key differentiator of this lens. Horizontal and vertical shift ranges of 21.00% and 8.20% allow the projector to be installed off the screen's center axis and the image to be brought back into alignment through lens shift, without requiring keystone correction. Keystone correction comes at a cost—each adjustment level reduces the effective pixel count and can blur text edges. In professional installations, never use keystone correction when lens shift can resolve the issue; this is essential for maintaining image quality.

2. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of installation distance to image width. This is a fixed-focal-length lens (0.75:1), so the installation distance varies linearly with image size, leaving no adjustment margin. Accurate measurements are essential before installation.

These are net distances from the front of the lens to the screen and do not include space for rear chassis ventilation or cabling. The figures are calculated for a 16:10 image; actual on-site measurements and the manual take precedence.

3. Compatible Models (2 Sony Models)

The table below is ordered by model production date, from newest to oldest, and includes each model's resolution, brightness, and factory lens zoom ratio for quick selection according to project requirements.

4. Three Things to Confirm Before Replacement

• Match the panel and resolution. This model is designed for 0.96-inch panels. Projectors with a different panel size or resolution may exhibit somewhat different projection performance, so checking the chassis nameplate before installation is the safest approach.
• Check the interface and locking mechanism. Interfaces are generally interchangeable within the same platform generation, but the positions of the locking clips vary between generations. If the image appears skewed or the edges appear misaligned after installation, the lock is usually not fully engaged rather than the lens itself being faulty.
• Factor lens-shift margin into the installation. The shift range provides some installation flexibility, but edge image quality declines when the lens is shifted to its limit. Keeping actual use within 70% of the rated values is recommended.

For models not on the list, it is safer to send us photos of the chassis nameplate and original lens for verification—models from the same platform generation often share interfaces, but ordering based solely on a similar model designation carries unnecessary risk.