Canon rf 24mm f 1 8 macro is stm vs sigma 15mm f 1 4 dc contemporary?

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From Canon RF 24mm f/1.8 Macro IS STM: Canon RF 24mm f/1.8 Macro IS STM: A macro lens by Canon for Full frame cameras, 24mm f/1.8. Specs - Maker: Canon - Focal length: 24mm (macro) - Maximum aperture: f/1.8 - Made for: Full frame sensors - Mounts: Canon RF - Stabilised: yes - Autofocus: yes What it frames like - On full frame (Canon RF): as marked, 24mm. - On APS-C (Canon) (Canon RF): like 38mm on full frame; f/1.8 gives about the depth of ...

From Sigma 15mm f/1.4 DC Contemporary: Sigma 15mm f/1.4 DC Contemporary: A prime lens by Sigma for APS-C cameras, 15mm f/1.4. A fast wide prime for APS-C, about 22.5mm equivalent. Specs - Maker: Sigma - Focal length: 15mm (prime) - Maximum aperture: f/1.4 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X, Canon RF - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E, Fujifilm X): like 22mm on full frame; f/1.4 gives about ...

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