Canon R6 has a Canon RF lens mount and currently there are 43 native lenses available for this mount.
The latest released lenses that are compatible with the R6 are the Canon RF-S 10-18mm F4.5-6.3, the Canon RF 24-105mm F2.8 L and the Canon RF 200-800mm F6.3-9.
R6 also has a sensor based image stabilization system that is up to 8.0-stops effective which means that all of these lenses will be stabilized when used on the R6.
Since Canon R6 has a Full frame sensor, it has a focal length multiplier of 1x so lenses will provide their original focal length on R6.
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Canon R6 Lenses with Image Stabilization
Canon R6 Lenses with Weather Sealings