SC290 Projector Lens 1.26–1.95:1 for 5 Appotronics Projectors: AL-FU715 FU10K FU805 FU705 FU905

SC290 is a medium-to-long-throw lens for the 0.65/0.66/0.67 panel group from Appotronics, with a 1.26–1.95:1 throw ratio and lens shift. It is compatible with 5 models in 1 model series. This guide presents the lens specifications, installation distances, model compatibility list, and replacement considerations in one place.

1. Lens Specifications

Shift capability is the key differentiator of this lens. A shift range of 110% horizontally and 50% vertically allows the projector to be installed off the screen's central axis and the image repositioned through lens shift without using keystone correction. Keystone correction comes at a cost—each adjustment sacrifices some effective pixels and softens text edges. In professional installations, use lens shift instead of keystone correction whenever possible; preserving image quality is the priority.

2. Calculating Installation Distance from 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 focus can be achieved anywhere within the applicable range.

The distances above are clear distances from the front of the lens to the screen and do not include space behind the projector for ventilation or cabling. They are calculated for a 16:10 aspect ratio; actual values should be confirmed through on-site measurements and the manual.

Image quality differs at the two zoom extremes: toward the near end, the image is brighter and the edges are slightly softer; toward the far end, the edges are sharper and the brightness decreases slightly. When the venue allows, target the middle of the range. After installation, first find the sharpest position using the focus ring, then fine-tune the lens shift—adjusting both variables at the same time makes precise alignment difficult.

3. Compatible Models (5 Models, Appotronics)

The following table is ordered by model production date, from newest to oldest and includes the resolution, brightness, and factory lens zoom ratio for each model, making it easy to identify the right option for project requirements.

Common Features of These Models

The factory-standard lenses for these 5 models generally have throw ratios listed as Depends on the lens. The 1.26–1.95:1 model featured here provides an adjusted 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 the zoom range is adjusted.

4. Three Checks Before Replacement

• The panel and resolution must match. This model is compatible with 0.67 inches panels. Projectors with a different panel size or resolution will produce somewhat different projection performance, so the safest approach is to check the chassis nameplate before installation.
• Check the interface and locking mechanism. Interfaces are generally compatible within the same platform generation, but the position of the locking latch varies between generations. If the image is skewed or the edges are not sharp after installation, the lock is usually not fully engaged; this is rarely a problem with the lens itself.
• Allow for lens-shift headroom during installation. The shift range provides some installation flexibility, but edge image quality declines at the extremes. For actual use, keep lens shift within 70% of the rated values.

For models not included in the list, the safest option is to send us photos of the chassis nameplate and original lens for verification. The same platform generation often shares interfaces, but ordering based solely on a similar model designation is not worth the risk.