Canon rf s 10 18mm f 4 5 6 3 is stm vs sigma 10 18mm f 2 8?

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From Canon RF-S 10-18mm f/4.5-6.3 IS STM: Canon RF-S 10-18mm f/4.5-6.3 IS STM: A zoom lens by Canon for APS-C cameras, 10-18mm f/4.5-6.3. Specs - Maker: Canon - Focal length: 10-18mm (zoom) - Maximum aperture: f/4.5-6.3 (it gets darker as you zoom in) - Made for: APS-C sensors - Mounts: Canon RF - Stabilised: yes - Autofocus: yes What it frames like - On APS-C (Canon) (Canon RF): like 16-29mm on full frame; f/4.5-6.3 gives about the depth of field of f/7.2-10.1 there. ...

From Canon EF-S 10-18mm f/4.5-5.6 IS STM: Canon EF-S 10-18mm f/4.5-5.6 IS STM: A zoom lens by Canon for APS-C cameras, 10-18mm f/4.5-5.6.

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