Canon ef 17 40mm f 4l usm vs canon ef 24 70mm f 4l is usm?

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From Canon EF 24-70mm f/4L IS USM: Canon EF 24-70mm f/4L IS USM: A zoom lens by Canon for Full frame cameras, 24-70mm f/4. Specs - Maker: Canon - Focal length: 24-70mm (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, 24-70mm. - On APS-C (Canon) (Canon EF): like 38-112mm on full frame; f/4 gives about the depth of ...

From Canon EF 17-40mm f/4L USM: Canon EF 17-40mm f/4L USM: A zoom lens by Canon for Full frame cameras, 17-40mm f/4. An older, light L wide zoom that is plentiful used. Specs - Maker: Canon - Focal length: 17-40mm (zoom) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: Canon EF - Stabilised: no - Autofocus: yes What it frames like - On full frame (Canon EF): as marked, 17-40mm. - On APS-C (Canon) (Canon EF): like ...

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