Panasonic ET-C1T700 Long Throw Projector Lens: Compatible with 16 Models Including PT-REQ15C

Panasonic Original Lens ET-C1T700 is a genuine optical accessory for Panasonic professional projectors. It is a long-throw lens with a throw ratio of 2.07-3.38:1, designed for 0.8" 1DLP panels. The original compatibility list covers 16 models; before installation, simply verify against the projector model and panel size—no adapter rings needed. The value of an original lens isn't a few extra rows of numbers on a spec sheet, but that it is calibrated at the factory to the optical path and mount of that series: once installed, the image circle, edge brightness, and focus travel all match design values, so you don't need keystone correction to compensate for image quality.

1. Lens Specifications

The above specifications are subject to the original manufacturer's specifications. For mechanical dimensions, flange focal distance, and mount type not shown in the spec table, please verify with us against your projector model—ordering based on model similarity alone carries the risk of incompatibility.

2. Converting Throw Ratio to Installation Distance

Throw ratio is the ratio of installation distance to image width. This original lens is zoom (2.07-3.38:1), so the same image size corresponds to a range of distances; as long as installation falls within this range, focus can be achieved.

The above figures are the clear distance from the lens face to the screen, excluding rear ventilation and cabling space. Calculated at 16:10 aspect ratio; actual values are subject to on-site measurement and the original manufacturer's manual.

Image quality differs at the two ends of the zoom range: toward the near end the image is brighter with slightly softer edges; toward the far end edges are sharper with slightly reduced brightness. Where space permits, we recommend landing in the middle of the range; after installation, first find the sharpest position on the focus ring, then fine-tune the shift.

3. Compatible Models (16)

The table below is taken from the original compatibility list; brightness and resolution are filled in from the model database, with "—" where unavailable—no speculation.

To check whether models outside this list are compatible, please send us photos of the projector nameplate and the existing lens for verification—same-generation platforms often share mounts, but ordering based on model similarity is a risk not worth taking.

Throw Ratio Across Model Series

The same ET-C1T700 installed on the following series does not carry the same nominal throw ratio; selection must be based on the actual series of your projector.

4. Three Things to Confirm Before Replacement

• Panel size must match. The ET-C1T700 is designed for 0.8" 1DLP panels. Projectors with different panel sizes or resolutions may mount physically, but the image circle and edge brightness will suffer.
• Calculate installation distance first. This lens has a nominal throw ratio of 2.07-3.38:1; use the table in Section 2 to map it to your venue dimensions. Prime lenses have no margin, and even with zoom you should allow 10–20 cm at each end.
• Check the mount and locking. The original lens is calibrated to the mount of that series; after installation you must hear it lock into place. Image skew or soft edges are usually caused by incomplete locking, not the lens itself.

If unsure, take a photo of the projector nameplate and the existing lens nameplate and send them to us—verifying against the actual hardware is the safest approach.