Canon rf 28 70mm f 2l usm vs sigma 17 40mm f 1 8 dc art?

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From Sigma 17-40mm f/1.8 DC Art: Sigma 17-40mm f/1.8 DC Art: A zoom lens by Sigma for APS-C cameras, 17-40mm f/1.8. A constant f/1.8 standard zoom for APS-C mirrorless, in the spirit of the 18-35mm f/1.8 for DSLRs. Specs - Maker: Sigma - Focal length: 17-40mm (zoom) - Maximum aperture: f/1.8 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X, L-Mount, Canon RF - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E, Fujifilm ...

From Canon RF 28-70mm f/2L USM: Canon RF 28-70mm f/2L USM: A zoom lens by Canon for Full frame cameras, 28-70mm f/2. A big, heavy zoom with the aperture of a fast prime. Specs - Maker: Canon - Focal length: 28-70mm (zoom) - Maximum aperture: f/2 - Made for: Full frame sensors - Mounts: Canon RF - Stabilised: no - Autofocus: yes What it frames like - On full frame (Canon RF): as marked, 28-70mm. - On APS-C (Canon) (Canon RF): ...

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