Appotronics XL070FR Short Zoom Standard Throw Projector Lens: SK11KAS SK13KAS SK15KAS SU11KAS

Appotronics Original Lens XL070FR Short Zoom is a genuine optical accessory for Appotronics engineering projectors, belonging to the standard throw category, with a throw ratio of 0.70-0.85:1. The original compatibility list covers 6 projector 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 projector series: once installed, the image circle, edge illumination, and focus travel are all at their 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 against your projector model — ordering based on a similar model number 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 a zoom lens (0.70-0.85:1), so a given 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 behind the projector body. Calculated for a 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 the edges are sharper with slightly reduced brightness. If the venue allows, it is recommended to land 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 (6)

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, without speculation.

To determine whether models outside the list are usable, 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 a similar model number isn't worth it.

Throw Ratios Across Model Series

The same XL070FR Short Zoom installed on the following series has different nominal throw ratios; when selecting, use the value for the series your actual projector belongs to.

4. Three Things to Confirm Before Replacement

• Confirm the projector's 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 falloff after installation.
• Calculate the installation distance first. This lens has a nominal throw ratio of 0.70-0.85:1; use the table in Section 2 to map it to your venue's dimensions. Prime lenses have no margin, and even for zoom lenses, leave 10–20 cm at both ends.
• Check the mount and locking. Original lenses are calibrated to the mount of that projector series; 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.