Genuine NEC NP52ZL Short Zoom Lens for PA1505UL-B, PA1505UL-W, PA1705UL-B, PA1705UL-W

NEC Genuine Lens NP52ZL Short Zoom is an OEM optical accessory for NEC professional projectors. It is a standard-throw lens (Standard Throw) with a throw ratio of 0.63-0.85:1. The OEM compatibility list covers 4 models, so simply verify the projector model and panel size before installation; no adapter rings are required. The value of an OEM lens lies not in the additional specifications, but in the fact that it is calibrated at the factory to the optical path and lens mount of the corresponding projector series. Its image circle coverage, edge illumination, and focusing travel are all designed to meet the specified values, eliminating the need for keystone correction to compensate for image quality.

I. Lens Specifications

Brand	NEC (NEC)
Lens Model	NP52ZL Short Zoom
Throw Ratio	0.63-0.85:1
Product Type	Standard-throw lens (Standard Throw)
Compatible Models	4 models
Warranty	12 months; after-sales service is available for damage not caused by the user, subject to the date on the shipping documents

These specifications are subject to the OEM specifications. Mechanical dimensions, flange distance, and lens mount type are not listed in the specifications table, so please contact us with your projector model to verify them. Ordering directly based on a similar model carries the risk of the lens not fitting.

II. Calculating Installation Distance from the Throw Ratio

The throw ratio is the ratio of installation distance to image width. This OEM lens is a zoom lens (0.63-0.85:1), so the same image size corresponds to a range of installation distances, and focus can be achieved anywhere within that range.

Image Size	Image Width	Required Installation Distance
100 inches	2.15 m	Approx. 1.35 – 1.83 m
120 inches	2.58 m	Approx. 1.63 – 2.19 m
150 inches	3.22 m	Approx. 2.03 – 2.74 m
200 inches	4.30 m	Approx. 2.71 – 3.65 m

These figures represent the clear distance from the front of the lens to the screen and do not include space required for rear cooling and cable connections. They are calculated for a 16:10 image; actual distances should be verified on site and according to the manufacturer's manual.

Image quality differs at the two ends of the zoom range: near the short-throw end, the image is brighter and the edges are slightly softer; near the long-throw end, the edges are sharper and brightness decreases slightly. When venue conditions permit, use the middle of the range. After installation, find the sharpest image using the focus ring, then fine-tune the lens shift.

III. Compatible Models (4 Models)

The following table is taken from the OEM compatibility list; brightness and resolution have been populated from the model database. Unavailable values are shown as —, with no assumptions made.

Model	Brightness	Resolution
PA1505UL-B	14000 lumens	1920x1200
PA1505UL-W	14000 lumens	1920x1200
PA1705UL-B	16000 lumens	1920x1200
PA1705UL-W	16000 lumens	1920x1200

For models not included in the list, please send us photos of the projector nameplate and the current lens for verification. Platforms from the same generation often share the same lens mount, but ordering based solely on a similar model name carries unnecessary risk.

Throw Ratio by Model Series

When the same NP52ZL Short Zoom lens is used with the series listed below, the nominal throw ratio varies. Use the value corresponding to the actual projector series.

Model Series	Throw Ratio
—	0.63-0.85:1

IV. Three Checks Before Replacement

• Confirm the projector's imaging panel and resolution.OEM lenses are designed for a specific panel size. If the panel specifications differ, the image circle cannot be fully covered, resulting in vignetting or edge light loss after installation.
• Calculate the installation distance first.The nominal throw ratio of this lens is 0.63-0.85:1. Use the table in Section II to calculate the distance for your venue. A fixed-focus lens offers no adjustment margin; even with a zoom lens, allow 10–20 cm at both ends of the range.
• Verify the lens mount and locking mechanism.OEM lenses are calibrated to the lens mount of the corresponding projector series, and you must hear the lock engage after installation. 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 each nameplate—the projector and the current lens—and send them to us. Verification against the actual hardware is the safest approach.