NEC NP40ZL Zoom Standard Throw Lens for 28 Models: PA1004UL-B, PA1004UL-W, PA653U

NEC Genuine NP40ZL Zoom Lens is an OEM optical accessory for NEC professional projectors. It is a standard-throw lens with a 0.79-1.11:1 throw ratio. The OEM compatibility list covers 28 models. Before installation, simply verify the projector model and panel size; no adapter ring workaround is needed. The value of an OEM lens lies not in the extra figures in the specification sheet, but in the fact that it is calibrated at the factory to the optical path and lens mount of that projector series. Once installed, image-circle coverage, edge illumination, and focusing travel all meet their design specifications, so there is no need to use keystone correction to compensate for image quality.

1. Lens Specifications

These specifications are subject to the OEM specifications. For mechanical dimensions, flange distance, and mount type not listed in the specification table, please contact our team with the exact projector model. Ordering solely on the basis of a similar model carries the risk that the lens will not fit.

2. 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 (0.79-1.11:1), so each image size corresponds to a range of installation distances. The lens can focus at any distance within that range.

These figures represent the clear distance from the front of the lens to the projection screen and do not include clearance for rear housing ventilation and cable connections. They are calculated for a 16:10 image; actual site measurements and the OEM manual take precedence.

Image quality differs at the two ends of the zoom range: images are brighter with slightly softer edges near the short-throw end, while edges are sharper with slightly lower brightness near the long-throw end. Where the venue allows, use a position near the middle of the range. After installation, find the sharpest setting on the focus ring, then fine-tune the lens shift.

3. Compatible Models (28 Models)

The following table is based on the OEM compatibility list. Brightness and resolution are populated from the model database; unavailable specifications are marked with an em dash (—), with no assumptions made.

For compatibility with a model not listed here, send us a photo of the projector nameplate and the current lens. Same-generation platforms often share the same mount, but ordering based only on a similar model is not worth the compatibility risk.

Throw Ratio by Model Series

The rated throw ratio varies by projector series when the same NP40ZL Zoom lens is installed. Select the value based on the series of the projector in use.

4. Three Checks Before Replacement

• Confirm the projector panel and resolution.OEM lenses are designed for a specific panel size. If the panel specifications differ, the image circle cannot cover the panel, resulting in vignetting or edge light loss after installation.
• Calculate the installation distance first.This lens has a rated throw ratio of 0.79-1.11:1. Use the table in Section 2 to calculate the distance for your venue. A fixed lens offers no adjustment range, and even a zoom lens requires 10–20 cm of clearance at both ends.
• Verify the lens mount and locking mechanism.OEM lenses are calibrated to the mount of the corresponding projector series. After installation, you must hear the lens lock fully into place. A skewed image or soft edges usually indicate that the lens is not fully locked rather than a problem with the lens itself.

If you are unsure, take one photo of the projector nameplate and one of the current lens nameplate, then send them to us. Verification against the physical products is the safest approach.