What is the sony vario tessar t e 16 70mm f 4 za oss good for?

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From Sony Vario-Tessar T* E 16-70mm f/4 ZA OSS: Sony Vario-Tessar T* E 16-70mm f/4 ZA OSS: A zoom lens by Sony for APS-C cameras, 16-70mm f/4. Specs - Maker: Sony - Focal length: 16-70mm (zoom) - Maximum aperture: f/4 - Made for: APS-C sensors - Mounts: Sony E - Stabilised: yes - Autofocus: yes What it frames like - On APS-C (Sony E): like 24-105mm on full frame; f/4 gives about the depth of field of f/6 there. - On the larger-sensor bodies of Sony E: ...

From Sony Vario-Tessar T* FE 24-70mm f/4 ZA OSS: Sony Vario-Tessar T* FE 24-70mm f/4 ZA OSS: A zoom lens by Sony for Full frame cameras, 24-70mm f/4.

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