SC228 Projector Lens 0.85–1.37:1 for 1 Compatible Model, Including Quanse Guangxian WU20

The SC228 is a short-throw lens for 0.96-inch panels (Quanse Guangxian), with a 0.85–1.37:1 throw ratio and lens shift. It is compatible with 1 projector model in 1 model series. This article presents the lens specifications, installation distance, model compatibility list, and replacement considerations in one place.

I. Lens Specifications

Lens shift is the key differentiator of this lens. A shift range of 10% horizontally and 4% vertically allows the projector to be installed off the screen's centerline and the image repositioned through lens shift without using keystone correction. Keystone correction has a cost—every adjustment sacrifices some effective pixels and can blur text edges. In professional installations, never resort to keystone correction when lens shift can solve the alignment; this is the minimum standard for image quality.

II. Calculating Installation Distance from the Throw Ratio

The throw ratio is the ratio of installation distance to image width. This is a zoom lens (0.85–1.37:1), so each image size corresponds to a range of installation distances, and it can focus at any point within that range.

These distances represent the clear distance from the lens front surface to the screen and do not account for rear housing ventilation or cable-routing space. Calculations are based on a 16:10 image; actual values should be verified through on-site measurements and in the manual.

Image quality varies at the two ends of the zoom range: near the short-throw end, the image is brighter and the edges are slightly softer; near the long-throw end, the edges are sharper and brightness decreases slightly. When the venue allows, use the middle of the range. After installation, find the sharpest setting on the focus ring, then fine-tune the lens shift—adjusting both at once makes it difficult to achieve precise alignment.

III. Compatible Models (1 Model, Quanse Guangxian)

The following table is ordered by model production date, from newest to oldest, and lists each model's resolution, brightness, and factory-supplied lens zoom ratio, enabling quick selection according to project requirements.

The zoom ratio is the zoom factor of the model's factory-supplied standard lens (upper limit ÷ lower limit of its standard throw ratio), not the zoom range of the lens featured in this article.

Factory-Replaceable Lens Models

One model in this range supports replacement with factory lenses. The corresponding throw ratio for each lens model is listed below for comparison with factory solutions.

Factory lenses for Quanse Guangxian

The 0.85–1.37:1 ratio of the model featured in this article is closest to the focal range of the factory A19 (1.02~1.36), making the two options easy to compare directly.

Common Characteristics of This Model Range

The factory-supplied standard lens for this model generally falls within the 1.5-2.0:1 range. The 0.85–1.37:1 ratio of the model featured in this article represents an adjustment to the focal range, allowing different image sizes at the same projection distance—which is the direct reason for replacing the lens. It also retains the full lens-shift capability, so the image can still be aligned after the focal range is adjusted.

IV. Three Checks Before Replacement

• The panel and resolution must match. This model is compatible with 0.96-inch panels. Projectors with a different panel size or resolution will produce somewhat different projection results; for the most reliable verification, check the nameplate on the projector before installation.
• Interfaces and locking mechanism. Interfaces are generally compatible within the same platform generation, but the locking latch position varies by generation. If the image is skewed or the edges are not sharp after installation, the latch is usually not fully engaged rather than the lens itself being faulty.
• Account for lens-shift clearance in the installation. The shift range provides some installation flexibility, but edge image quality degrades when the shift is pushed to its limits. For actual use, keep the shift within 70% of the rated value.

For models not included in the list, it is safer to send us photos of the projector nameplate and original lens for verification. Platforms of the same generation often share interfaces, but ordering based solely on a similar model number poses unnecessary risk.