Sigma 17 40mm f 1 8 dc art vs sony fe 28 70mm f 2 gm?

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From Sigma 17-40mm f/1.8 DC Art: Sigma 17-40mm f/1.8 DC Art: A zoom lens by Sigma for APS-C cameras, 17-40mm f/1.8. A constant f/1.8 standard zoom for APS-C mirrorless, in the spirit of the 18-35mm f/1.8 for DSLRs. Specs - Maker: Sigma - Focal length: 17-40mm (zoom) - Maximum aperture: f/1.8 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X, L-Mount, Canon RF - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E, Fujifilm ...

From Sony FE 28-70mm f/2 GM: Sony FE 28-70mm f/2 GM: A zoom lens by Sony for Full frame cameras, 28-70mm f/2. A standard zoom as bright as an f/2 prime. Specs - Maker: Sony - Focal length: 28-70mm (zoom) - Maximum aperture: f/2 - Made for: Full frame sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E): as marked, 28-70mm. - On APS-C (Sony E): like 42-105mm on ...

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