NEC NP25FL Short Fixed Lens for PH1000U and PH1400U

NEC Original Lens NP25FL Short Fixed is an original optical accessory for NEC professional projectors. It is a short-throw (Short Throw) lens with a throw ratio of 0.67:1. The official compatibility list covers 2 models; before installation, simply verify the projector model and panel size—there is no need to make do with an adapter ring. The value of an original lens lies not in the extra rows of specifications, but in the fact that it is factory-calibrated to the optical path and mount of that projector series: once installed, the image circle, edge illumination, and focusing travel are all at their design values, so there is no need to use keystone correction to compensate for image quality.

1. Lens Specifications

The above specifications are subject to the manufacturer's official specifications. For mechanical dimensions, flange distance, and mount type not shown in the specifications table, please check with us using the projector model; ordering based solely on a similar model carries the risk of the lens not fitting.

2. Converting Throw Ratio to Installation Distance

The throw ratio is the ratio of the installation distance to the image width. This original lens has a fixed focal length (0.67:1), so the installation distance varies linearly with image size, with no adjustment margin. Accurate measurements are essential before installation.

The distances above are the clear distances from the front surface of the lens to the screen and do not allow for rear projector ventilation or cable connections. They are calculated for a 16:10 image; actual distances must be verified on site and according to the manufacturer's manual.

3. Compatible Projector Models (2 Models)

The table below is taken from the manufacturer's official compatibility list; brightness and resolution are populated from the model database. Unavailable data is shown as “—”; no assumptions are made.

To check whether a model not on the list is compatible, please send us photos of the projector nameplate and the existing lens—projectors from the same generation often share the same mount, but the risk of ordering based on a similar model is not worth taking.

Throw Ratio by Model Series

The nominal throw ratio of the same NP25FL Short Fixed lens varies among the following projector series. Select the value based on the series of the actual projector.

4. Three Checks Before Replacement

• Confirm the projector's imaging chip and resolution.Original 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 edge light loss after installation.
• Calculate the installation distance first.This lens has a nominal throw ratio of 0.67:1; use the table in Section 2 to calculate the distance for your installation space. A fixed-focus lens has no adjustment margin, and even a zoom lens requires 10–20 cm of clearance at both ends.
• Verify the mount and locking mechanism.The original lens is calibrated to the mount of the projector series; after installation, you must hear the lock engage. A skewed image or soft edges is most often caused by incomplete locking, not by the lens itself.

If you are unsure, take one photo of each nameplate—the projector and the existing lens—and send them to us. Checking the actual products is the most reliable way to confirm compatibility.