Ricoh 512914 Short Zoom #A1 Standard-Throw Projection Lens Guide for PJ WUL6280 PJ WXL6280

Ricoh OEM Lens 512914 Short Zoom #A1 is an original optical accessory for Ricoh business projectors. It is a standard-throw lens with a 0.75-0.95:1 throw ratio. The OEM compatibility list covers 2 models; before installation, simply verify the projector model and panel size, with no need for adapter rings. The value of an OEM lens lies not in the extra figures in its specification sheet, but in the fact that it is calibrated at the factory for the optical path and mount of that projector series. Once installed, the image circle, edge illumination, and focusing travel are all designed values, eliminating the need to use keystone correction to compensate for image quality.

I. Lens Specifications

The above specifications are subject to the OEM specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please contact us with the projector model. Ordering based solely on a similar model carries the risk of incompatibility.

II. Calculating Installation Distance from the Throw Ratio

The throw ratio is the ratio of the installation distance to the image width. This OEM lens is a zoom lens (0.75-0.95:1), so the same image size corresponds to a range of installation distances. The lens can focus at any position within that range.

These are clear distances from the front of the lens to the screen and do not include cooling clearance or space for cable connections behind the projector. The figures are calculated for a 16:10 image; actual distances should be verified on site and in accordance with the OEM manual.

Image quality differs at the two ends of the zoom range: the image is brighter and the edges slightly softer at the short end, while the edges are sharper and brightness is slightly lower at the long end. Where site conditions permit, use a position in the middle of the range. After installation, first find the sharpest position using the focus ring, then fine-tune the lens shift.

III. Compatible Models (2 models)

The following table is taken from the OEM compatibility list. Brightness and resolution are populated from the model database; unavailable figures are shown as 「—」 without making assumptions.

To check whether a model outside the list is compatible, send us photos of the projector nameplate and the existing lens. Platforms of the same generation often share the same mount, but ordering based only on a similar model introduces unnecessary risk.

Throw Ratio by Model Series

The rated throw ratio of the same 512914 Short Zoom #A1 lens varies by projector series. Use the value for the series of the actual projector when selecting a lens.

IV. Three Checks Before Replacement

• Confirm the projector’s imaging chip and resolution. OEM lenses are designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the full image, resulting in vignetting or light loss at the edges.
• Calculate the installation distance first. This lens has a rated throw ratio of 0.75-0.95:1. Use the table in Section 2 to calculate the distance for your installation site. Fixed-focus lenses provide no margin, while zoom lenses also require 10–20 cm of clearance at both ends of the range.
• Verify the mount and locking mechanism. The OEM lens is calibrated for the mount of that projector series. You must hear it click into the locked position after installation. A skewed image or soft edges are usually caused by incomplete locking rather than a problem with the lens itself.

If you are unsure, take one photo of the projector nameplate and one of the existing lens nameplate, then send them to us. Verification against the actual hardware is the most reliable approach.