Canon ef 24 105mm f 4l is usm vs sigma 24 105mm f 4 dg os hsm art?

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From Sigma 24-105mm f/4 DG OS HSM Art: Sigma 24-105mm f/4 DG OS HSM Art: A zoom lens by Sigma for Full frame cameras, 24-105mm f/4. Specs - Maker: Sigma - Focal length: 24-105mm (zoom) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: Canon EF, Nikon F - Stabilised: yes - Autofocus: yes What it frames like - On full frame (Canon EF, Nikon F): as marked, 24-105mm. - On APS-C (Nikon F): like 36-158mm on full frame; f/4 gives about ...

From Canon EF 24-105mm f/4L IS USM: Canon EF 24-105mm f/4L IS USM: A zoom lens by Canon for Full frame cameras, 24-105mm f/4. The classic full-frame kit zoom, plentiful on the used market. Specs - Maker: Canon - Focal length: 24-105mm (zoom) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: Canon EF - Stabilised: yes - Autofocus: yes What it frames like - On full frame (Canon EF): as marked, 24-105mm. - On APS-C (Canon) (Canon EF): like ...

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