What are the alternatives to the canon rf 10 20mm f 4l is stm?

Here is what the site says about that.

From Canon RF 10-20mm f/4L IS STM: Canon RF 10-20mm f/4L IS STM: A zoom lens by Canon for Full frame cameras, 10-20mm f/4. Specs - Maker: Canon - Focal length: 10-20mm (zoom) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: Canon RF - Stabilised: yes - Autofocus: yes What it frames like - On full frame (Canon RF): as marked, 10-20mm. - On APS-C (Canon) (Canon RF): like 16-32mm on full frame; f/4 gives about the depth of ...

From Video: For filmmaking: - A body with full-width 4K (no heavy crop), 10-bit recording, and a headphone jack. - Fast primes or constant-aperture zooms, so exposure doesn't change as you zoom. - ND filters, because to keep the shutter at about twice the frame rate (1/50s at 25 frames a second) in daylight with a wide aperture, you need to cut light.

Quoted from this site's pages.