WJ151 Projector Lens 0.62–0.8:1 for 5 Appotronics Models: AL-FU715, FU10K, FU805, FU705, FU905

WJ151 is a short-throw lens designed for 0.65/0.66/0.67 panels (Appotronics), with a 0.62–0.8:1 throw ratio and lens-shift capability. It is compatible with 5 projector models across 1 model series. This article brings together the lens specifications, installation distance, model compatibility list, and replacement considerations.

1. Lens Specifications

Lens-shift capability is the key differentiator of this lens. With ±53% horizontal and ±23% vertical shift, the projector can be installed off the screen center axis, and lens shift can reposition the image without keystone correction. Keystone correction comes at a cost—each adjustment reduces the effective resolution and can blur text edges. In professional installations, never use keystone correction when lens shift can resolve the issue; this is the baseline for image quality.

2. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of installation distance to image width. This lens has a zoom range of 0.62–0.8:1, so each image size corresponds to a range of installation distances, and focus can be achieved anywhere within that range.

These figures represent the clear distance from the front face of the lens to the screen and do not include space behind the projector for cooling and cable connections. They are based on a 16:10 image; actual values should be verified through on-site measurement and against the manual.

Image quality differs at the two ends of the zoom range: at the near end, the image is brighter and the edges are slightly softer; at the far end, the edges are sharper but brightness is slightly lower. If site conditions allow, use the middle of the range. After installation, first find the sharpest setting on the focus ring, then fine-tune the lens shift—adjusting both variables at once makes precise alignment difficult.

3. Compatible Models (5 Models, Appotronics)

The table below is ordered by model production time, from newest to oldest and includes each model's resolution, brightness, and factory-lens zoom ratio, making it easy to identify the right model for the project requirements.

Common Features of These Models

The throw ratios of the factory-standard lenses supplied with these five models vary by lens (Depends on the lens). The 0.62–0.8:1 ratio of the model featured 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. It also retains the full lens-shift range, so the image can still be aligned after the focal range is adjusted.

4. Three Checks Before Replacement

• Match the panel and resolution. This model is compatible with a 0.67-inch panel. Projectors with a different panel size or resolution may show differences in projection performance, so checking the specifications against the nameplate on the projector before installation is the safest approach.
• Interface and locking mechanism. Projectors using the same platform generation generally share compatible interfaces, but the locking latch positions vary between generations. If the image is skewed or the edges are not sharp 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 installation flexibility, but edge image quality degrades when it is pushed to the limit. For actual use, keep shift within 70% of the rated value.

For models not on the list, the safest approach is to send us a photo of the projector nameplate and the original lens for verification—platforms of the same generation often share interfaces, but ordering solely on the basis of a similar model designation carries unnecessary risk.