SC281 Projector Lens 1.26–1.95:1 for 5 Hisense Models: PA92, HLP850, PA80, PA85, P75

SC281 is a medium-to-long-throw lens for 0.65/0.66/0.67 panels (Hisense), with a 1.26–1.95:1 throw ratio and lens shift. It is compatible with 5 models across 1 model series. This article presents the lens specifications, installation distances, model compatibility list, and replacement considerations in one place.

I. Lens Specifications

Lens shift is the key differentiator of this lens. The 110% horizontal and 50% vertical shift range means the projector can be installed off the screen’s central axis and the image can be repositioned using lens shift without keystone correction. Keystone correction comes at a cost—each adjustment step sacrifices some effective pixels and blurs text edges. In professional installations, avoid keystone correction whenever lens shift can resolve the issue; this is essential for image quality.

II. Calculating Installation Distance from the Throw Ratio

The throw ratio is the ratio of the installation distance to the image width. This is a zoom lens (1.26–1.95:1), so each image size corresponds to a range of installation distances, and the lens can be focused anywhere within that range.

These values represent the clear distance from the front of the lens to the screen and do not include space for rear ventilation and cable connections. They are calculated for a 16:10 image; actual distances should be verified on site and against the manual.

Image quality differs at the two ends of the zoom range: at the short end, the image is brighter and the edges are slightly softer; at the long end, the edges are sharper and the brightness is slightly lower. Where space permits, use the middle of the range. After installation, find the sharpest position on the focus ring first, then fine-tune the lens shift—adjusting both variables at once makes precise alignment difficult.

III. Compatible Models (5 Models, Hisense)

The table below is ordered by model production time, from newest to oldest, and lists each model’s resolution, brightness, and zoom ratio for the original lens, making it easy to identify the right option for your project requirements.

The zoom ratio is the zoom factor of the model’s original standard lens (upper limit ÷ lower limit of the original throw ratio range), not the zoom range of the lens discussed in this article.

Common Features of These Models

The original standard lenses for these 5 models generally have throw ratios concentrated around 1.4-2.5:1. The 1.26–1.95:1 ratio of the model in this article effectively adjusts the focal range, allowing different image sizes at the same projection distance—this is the direct reason for replacing the lens. Full lens-shift capability is retained, so the image can still be aligned after adjusting the focal range.

IV. Three Checks Before Replacement

• Confirm the panel and resolution match. This model is compatible with 0.67-inch panels. Projectors with a different panel size or resolution will have different projection performance; checking the projector’s nameplate before installation is the safest option.
• Check the interface and locking mechanism. Same-generation platforms generally offer good interface compatibility, but the locking clip positions may vary by generation. If the image appears skewed or the edges are not sharp after installation, the locking mechanism is usually not fully engaged rather than the lens itself being faulty.
• Include lens-shift clearance in the installation plan. The shift range provides installation flexibility, but edge image quality declines at the limits. It is recommended to keep actual use within 70% of the rated values.

For models not included in the list, it is safer to send us photos of the projector’s nameplate and original lens for verification—same-generation platforms often share interfaces, but the risks of ordering based on a similar model code are not worth taking.