WA108 Projector Lens 0.75:1 for 3 Christie Installation Projectors, Including 4K7-HS and 4K10-HS

WA108 is a short-throw lens for 0.96-inch panels (Christie and Honghe), with a 0.75:1 throw ratio and lens shift. It is compatible with 3 models across 2 model series. This guide presents the lens specifications, installation distances, model compatibility list, and replacement considerations all in one place.

I. Lens Specifications

Lens shift is the key differentiator of this lens. The horizontal 21.00% and vertical 8.20% shift ranges allow the projector to be installed off the screen centerline and use lens shift to bring the image back into alignment without keystone correction. Keystone correction comes at a cost—every level of correction reduces the effective pixel count and blurs text edges. In professional installations, always use lens shift rather than keystone correction when possible; preserving image quality is non-negotiable.

II. Calculating Installation Distance from Throw Ratio

The throw ratio is the ratio of the installation distance to the image width. This lens has a fixed focus (0.75:1), so the installation distance varies linearly with image size and offers no adjustment margin. Measurements must be taken accurately before installation.

These values represent the clear distance from the front of the lens to the screen and do not account for rear chassis clearance for heat dissipation and cable routing. Values are calculated for a 16:10 image; actual distances should be verified through on-site measurements and against the manual.

III. Compatible Models (3 Models: Christie and Honghe)

The table below is ordered by model production date, from newest to oldest. It lists the resolution, brightness, and factory-lens zoom ratio of each model for quick selection according to project requirements.

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

Factory Replaceable Lens Models

All 3 models in this group can be fitted with factory lenses. The throw ratio for each lens model is listed below, providing a reference for comparison with factory solutions.

Honghe Factory Lenses

The 0.75:1 ratio of the model featured in this article is closest to the focal range of the factory A11 (0.65~0.75), making direct comparison and selection easy.

Common Features Across These Models

The factory-standard lens throw ratios across the 3 models vary; the exact range Depends on the lens. The 0.75:1 ratio of the model featured here effectively changes the focal range, enabling different image sizes from 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 changing the focal range.

IV. Three Checks Before Replacement

• The panel and resolution must match. This model is designed for 0.96-inch panels. Projectors with a different panel size or resolution may show differences in projection performance, so check the specifications against the projector nameplate before installation.
• Interfaces and locking mechanisms. Interfaces are generally compatible within the same platform generation, but locking latch positions differ between generations. If the image appears skewed or the edges look soft after installation, the lock is usually not fully engaged rather than the lens itself being defective.
• Allow for shift margin in the installation. The shift range provides some installation flexibility, but image quality at the edges declines when the lens is pushed to its limits. Actual use should be kept within 70% of the rated values.

For compatibility with a model not listed in the table, the safest approach is to send us a photo of the projector nameplate and original lens for verification. Models on the same platform generation often share interfaces, but placing an order solely because the model designation appears similar is not worth the risk.