WB361 Projector Lens, 0.74–0.77:1, for 5 Hisense Models: PA92, HLP850, PA80, PA85, P75

WB361 is a short-throw lens for 0.65/0.66/0.67 panel groups (Hisense), with a throw ratio of 0.74–0.77:1 and lens shift. It fits 5 models across 1 model series. This article lists the lens specifications, installation distances, model compatibility list, and replacement notes all in one place.

I. Lens Specifications

The shift capability is the key differentiator of this lens.With a shift range of 70.30% horizontal and 32% vertical, the projector can be installed off the screen's central axis and the image repositioned via lens shift, without resorting to keystone correction. Keystone correction comes at a price—each step of correction loses part of the effective pixels and blurs text edges. In professional installations, wherever shift can solve the alignment, keystone correction should never be used; this is the baseline for image quality.

II. Converting Throw Ratio into Installation Distance

The throw ratio is the ratio of the installation distance to the image width. This lens is a zoom lens (0.74–0.77:1), so a single image size corresponds to a range of distances, and any position within that range can be brought into focus at installation time.

The above figures are the clear distance from the front of the lens to the screen, without allowing for rear cooling and cabling space on the chassis. Calculated on a 16:10 aspect ratio; actual on-site measurement and the manual take precedence.

Image quality differs at the two ends of the zoom range: toward the near end the image is brighter with slightly looser edges; toward the far end the edges are tighter and brightness drops slightly. Where the venue allows, aim for the middle of the range. After installation, first find the sharpest position on the focus ring, then fine-tune the shift—adjusting both variables at once makes it very hard to dial in.

III. Compatible Models (5 Models, Hisense)

The table below is ordered from newest to oldest by model production date, and lists the resolution, brightness, and zoom ratio of the original lens for each model, so you can quickly identify the right option for a project.

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

Common Traits of This Model Group

The original standard lenses for these 5 models are mostly concentrated in the 1.4-2.5:1 throw ratio range. The model in this article, at 0.74–0.77:1, effectively retunes the focal range, allowing a different image size from the same projection distance—this is precisely the reason for changing the lens. At the same time, full shift capability is retained, so the image can still be aligned after the focal range is adjusted.

IV. Three Checks Before Replacement

• Match the panel and resolution.This model is designed for 0.67-inch panels. Projectors with a different panel size or a different resolution will show somewhat different projection performance; checking against the nameplate on the chassis before installation is the safest approach.
• Mounting interface and locking mechanism.Interfaces on platforms of the same generation are generally compatible, but the position of the locking latch differs between generations. If the image appears skewed or the edges look loose after fitting, the issue is most often that the lock has not fully engaged, rather than a problem with the lens itself.
• Factor the shift margin into the installation.The shift range leaves some margin for installation, but pushing it to the limit degrades edge image quality, so keep actual use within 70% of the rated value.

For models outside the list, it is safer to send us the chassis nameplate and a photo of the original lens for verification—platforms of the same generation often share the same interface, but ordering on the basis of a similar model number alone is not worth the risk.