Appotronics XL036FR Short Fixed Ultra Short Throw Lens: SK11KAS SK13KAS SK15KAS SU11KAS SU13KAS

Appotronics Original Lens XL036FR Short Fixed is a genuine optical accessory for Appotronics engineering projectors, belonging to the Ultra Short Throw category with a throw ratio of 0.36:1. The original compatibility list covers 6 projector models; simply verify against the projector model and panel size before installation—no need to rely on adapter rings. The value of an original lens isn't about having a few more numbers on a spec sheet, but that it is calibrated at the factory to match the optical path and mount of that series of projector bodies: once installed, the image circle, edge illumination, and focus travel all meet 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 that are not shown in the spec table, please verify with us based on 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 fixed-focal (0.36:1), so the installation distance changes linearly with image size and has no adjustment margin—it must be measured accurately before installation.

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

3. Compatible Models (6 units)

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

For models not on the list, please send us photos of the projector nameplate and the existing lens for verification—same-generation platforms often share mounts, but the risk of ordering based on model similarity alone isn't worth it.

Throw Ratios Across Different Model Series

The same XL036FR Short Fixed lens, when installed on the following series, does not have the same nominal throw ratio; selection should be based on the actual series of your projector body.

4. Three Things to Confirm Before Replacement

• Confirm the projector chip and resolution. Original lenses are designed for specific panel sizes; if the panel specifications differ, the image circle cannot cover the screen, resulting in vignetting or edge light loss after installation.
• Calculate the installation distance first. This lens has a nominal throw ratio of 0.36:1; apply it to your venue dimensions using the table in Section 2. Fixed focal length has no margin; even for zoom lenses, leave 10–20 cm at both ends.
• Verify the mount and locking mechanism. Original lenses are calibrated to the mount of that series of projector bodies; after installation, you must hear the lock engage. Image skew and soft edges are mostly due to incomplete locking, not a problem with the lens itself.

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