Sony fe 16 35mm f 2 8 gm vs tamron 20 40mm f 2 8 di iii vxd?

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From Tamron 20-40mm f/2.8 Di III VXD: Tamron 20-40mm f/2.8 Di III VXD: A zoom lens by Tamron for Full frame cameras, 20-40mm f/2.8. Specs - Maker: Tamron - Focal length: 20-40mm (zoom) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: Sony E, Nikon Z - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E, Nikon Z): as marked, 20-40mm. - On APS-C (Sony E, Nikon Z): like 30-60mm on full frame; f/2.8 ...

From Sony FE 16-35mm f/2.8 GM: Sony FE 16-35mm f/2.8 GM: A zoom lens by Sony for Full frame cameras, 16-35mm f/2.8. Specs - Maker: Sony - Focal length: 16-35mm (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, 16-35mm. - On APS-C (Sony E): like 24-52mm on full frame; f/2.8 gives about the depth of field ...

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