Sigma 105mm f 1 4 dg hsm art vs zeiss otus 100mm f 1 4?

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From Sigma 105mm f/1.4 DG HSM Art: Sigma 105mm f/1.4 DG HSM Art: A prime lens by Sigma for Full frame cameras, 105mm f/1.4. A very large, very heavy portrait prime known for its background blur. Specs - Maker: Sigma - Focal length: 105mm (prime) - Maximum aperture: f/1.4 - Made for: Full frame sensors - Mounts: Canon EF, Nikon F, Sony E, L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (Canon EF, Nikon F, Sony ...

From Zeiss Otus 100mm f/1.4: Zeiss Otus 100mm f/1.4: A prime lens by Zeiss for Full frame cameras, 100mm f/1.4. Specs - Maker: Zeiss - Focal length: 100mm (prime) - Maximum aperture: f/1.4 - Made for: Full frame sensors - Mounts: Canon EF, Nikon F - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Canon EF, Nikon F): as marked, 100mm. - On APS-C (Nikon F): like 150mm on full frame; f/1.4 ...

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