Canon RS-SL07RST 4K Standard Long-Throw Lens for 5 REALiS/XEED Models

Canon Genuine Lens RS-SL07RST 4K Standard is an OEM optical accessory for Canon professional projectors. It is a long-throw lens with a throw ratio of 1.34-2.35:1. The official compatibility list covers 5 models. Before installation, simply verify the projector model and panel size; no adapter ring workaround is needed. The value of an OEM lens lies not in the additional figures in its specifications, but in the fact that it is calibrated at the factory to the optical path and lens mount of that projector series. Once installed, the image circle, edge illumination, and focus travel all meet the design specifications, eliminating the need to use keystone correction to compensate for image quality.

I. Lens Specifications

Brand	Canon (Canon)
Lens Model	RS-SL07RST 4K Standard
Throw Ratio	1.34-2.35:1
Product Type	Long Throw
Compatible Models	5 models
Warranty	12 months; after-sales service is available for damage not caused by the user, based on the date on the shipping invoice

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 contact us with your projector model. Ordering solely based on a similar model name carries the risk that the lens will not fit.

II. Converting the Throw Ratio into Installation Distance

The throw ratio is the ratio of the installation distance to the image width. This OEM lens is a zoom lens (1.34-2.35:1), so a given image size corresponds to a range of installation distances. The lens can be focused at any distance within that range.

Image Size	Image Width	Required Installation Distance
100 inches	2.15 m	Approx. 2.88 – 5.05 m
120 inches	2.58 m	Approx. 3.46 – 6.06 m
150 inches	3.22 m	Approx. 4.32 – 7.58 m
200 inches	4.30 m	Approx. 5.76 – 10.11 m

The distances above are the clear distances from the front element of the lens to the screen and do not include space required for rear cooling and cable connections. These figures are calculated for a 16:10 image; actual distances should be confirmed through on-site measurement and the manufacturer's manual.

Image quality varies at the two ends of the zoom range: the image is brighter with slightly softer edges near the wide-angle end, while the edges are sharper with slightly reduced brightness near the telephoto end. Where the installation environment allows, use the middle of the range. After installation, first find the sharpest position using the focus ring, and then fine-tune the lens shift.

III. Compatible Models (5 models)

The table below is taken from the manufacturer's official compatibility list. Brightness and resolution are populated from the model database; values that cannot be obtained are shown as "—", with no assumptions made.

Model	Brightness	Resolution
Canon REALiS 4K5020Z	—	—
Canon REALiS 4K6020Z	—	—
Canon REALiS 4K6021Z	—	—
Canon Europe XEED 4K5020Z	—	—
Canon Europe XEED 4K6021Z	—	—

To determine whether a model not listed above is compatible, please send us a photo of the projector nameplate and the existing lens for verification. Platforms from the same generation often share the same lens mount, but the risk of ordering based solely on similar model names is not worth taking.

Throw Ratios by Model Series

The nominal throw ratio varies among the following projector series when the same RS-SL07RST 4K Standard lens is installed. When selecting a lens, use the value corresponding to the series of the actual projector.

Model Series	Throw Ratio
—	1.34-2.35:1

IV. Three Checks Before Replacement

• Confirm the projector's imaging chip and resolution.OEM 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 light loss at the edges after installation.
• Calculate the installation distance first.This lens has a nominal throw ratio of 1.34-2.35:1. Use the table in Section 2 to match the dimensions of your installation site. Prime lenses provide no adjustment margin, and zoom lenses still require 10–20 cm of clearance at both ends of the range.
• Verify the mount and locking mechanism.OEM lenses are calibrated for the lens mounts of the corresponding projector series. You must hear the lock engage after installation. A skewed image and soft edges are usually caused by incomplete locking rather than a problem with the lens itself.

If you are unsure, take one photo of the projector nameplate and one photo of the existing lens nameplate and send them to us. Verification against the actual equipment is the most reliable approach.