Tamron 28 75mm f 2 8 di iii rxd vs sony fe 28 70mm f 3 5 5 6 oss?

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From Sony FE 28-70mm f/3.5-5.6 OSS: Sony FE 28-70mm f/3.5-5.6 OSS: A zoom lens by Sony for Full frame cameras, 28-70mm f/3.5-5.6. Specs - Maker: Sony - Focal length: 28-70mm (zoom) - Maximum aperture: f/3.5-5.6 (it gets darker as you zoom in) - Made for: Full frame sensors - Mounts: Sony E - Stabilised: yes - Autofocus: yes What it frames like - On full frame (Sony E): as marked, 28-70mm. - On APS-C (Sony E): like 42-105mm on full frame; ...

From Tamron 28-75mm f/2.8 Di III RXD: Tamron 28-75mm f/2.8 Di III RXD: A zoom lens by Tamron for Full frame cameras, 28-75mm f/2.8. Specs - Maker: Tamron - Focal length: 28-75mm (zoom) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E): as marked, 28-75mm. - On APS-C (Sony E): like 42-112mm on full frame; f/2.8 gives about the depth of field ...

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