Sigma 16mm f 1 4 dc dn contemporary vs ttartisan 17mm f 1 4?

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From Sigma 16mm f/1.4 DC DN Contemporary: Sigma 16mm f/1.4 DC DN Contemporary: A prime lens by Sigma for APS-C cameras, 16mm f/1.4. Specs - Maker: Sigma - Focal length: 16mm (prime) - Maximum aperture: f/1.4 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X, Micro Four Thirds, L-Mount, Canon RF, Nikon Z - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E, Fujifilm X, L-Mount, Nikon Z): like 24mm on full frame; f/1.4 gives about ...

From TTArtisan 17mm f/1.4: TTArtisan 17mm f/1.4: A prime lens by TTArtisan for APS-C cameras, 17mm f/1.4. Specs - Maker: TTArtisan - Focal length: 17mm (prime) - Maximum aperture: f/1.4 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X, Nikon Z, L-Mount, Micro Four Thirds - Stabilised: no - Autofocus: no, manual focus What it frames like - On APS-C (Sony E, Fujifilm X, Nikon Z, L-Mount): like 26mm on full frame; f/1.4 gives about ...

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