What is the leica vario elmarit sl 70 200mm f 2 8 asph good for?

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From Leica Vario-Elmarit-SL 70-200mm f/2.8 ASPH: Leica Vario-Elmarit-SL 70-200mm f/2.8 ASPH: A zoom lens by Leica for Full frame cameras, 70-200mm f/2.8. Specs - Maker: Leica - Focal length: 70-200mm (zoom) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: L-Mount - Stabilised: yes - Autofocus: yes What it frames like - On full frame (L-Mount): as marked, 70-200mm. - On APS-C (L-Mount): like 105-300mm on full frame; f/2.8 gives about the depth of field of f/4.2 there. ...

From Leica Vario-Elmarit-SL 28-70mm f/2.8 ASPH: Leica Vario-Elmarit-SL 28-70mm f/2.8 ASPH: A zoom lens by Leica for Full frame cameras, 28-70mm f/2.8.

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