SC271 Projector Lens 1.26–1.95:1 for Hisense P80, P100, P120 Engineering Projectors

SC271 is a medium-to-long-throw lens for the 0.65/0.66/0.67 panel group (Hisense), with a 1.26–1.95:1 throw ratio and lens shift. It is compatible with 3 projector models across 1 model series. This article presents the lens specifications, installation distances, model compatibility list, and replacement considerations in one place.

1. Lens Specifications

Lens shift is the key differentiator of this lens. A shift range of 110% horizontally and 50% vertically means the projector can be installed off the screen’s central axis and the image repositioned through lens shift without relying on keystone correction. Keystone correction comes at a cost—each adjustment reduces the effective pixel count and causes text edges to blur. In professional installations, never resort to keystone correction when lens shift can solve the alignment issue; preserving image quality is the non-negotiable baseline.

2. Calculating Installation Distance from Throw Ratio

Throw ratio is the ratio of installation distance to image width. This lens has a zoom range of 1.26–1.95:1, so each image size corresponds to a range of distances, and the lens can focus at any distance within that range during installation.

These figures represent the clear distance from the front face of the lens to the screen and do not allow for rear chassis ventilation or cable-routing space. Calculated for a 16:10 image; actual values should be verified through on-site measurements and the manual.

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

3. Compatible Models (3 Models, Hisense)

The table below is ordered from newest to oldest by model production date and lists each model’s resolution, brightness, and zoom ratio of the standard lens, enabling quick selection according to project requirements.

Common Features of These Models

The throw ratios of the standard lenses supplied with the 3 models vary by lens. The 1.26–1.95:1 ratio of the model featured in this article represents an adjustment to the focal range, allowing different image sizes at the same projection distance—this 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 zoom range is adjusted.

4. Three Things to Confirm Before Replacement

• Panel and resolution must match. This model is compatible with 0.67-inch panels. Projectors with a different panel size or resolution will show differences in projection performance, so checking the projector’s rating plate before installation is the safest option.
• Interface and locking mechanism. Interfaces are generally compatible within the same-generation platform, but the locking latch position varies between generations. If the image appears skewed or the edges are not sharp after mounting, the issue is most often that the lock is not fully engaged rather than a problem with the lens itself.
• Account for lens-shift margin in the installation. The shift range provides some installation flexibility, but edge quality declines when the shift is pushed to its limits. In practice, we recommend keeping actual shift within 70% of the rated value.

For models not included in the list, the safest approach is to send us a photo of the projector’s rating plate and the original lens for verification—interfaces are often shared across the same platform generation, but the risk of ordering based on a similar model designation is not worth taking.