Best camera for the sigma 500mm f 4 dg os hsm sports?

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From Sigma 500mm f/4 DG OS HSM Sports: Sigma 500mm f/4 DG OS HSM Sports: A prime lens by Sigma for Full frame cameras, 500mm f/4. Specs - Maker: Sigma - Focal length: 500mm (prime) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: Canon EF, Nikon F - Stabilised: yes - Autofocus: yes What it frames like - On full frame (Canon EF, Nikon F): as marked, 500mm. - On APS-C (Nikon F): like 750mm on full frame; f/4 gives about ...

From Sigma 500mm f/5.6 DG DN OS Sports: Sigma 500mm f/5.6 DG DN OS Sports: A prime lens by Sigma for Full frame cameras, 500mm f/5.6. A comparatively light 500mm prime for wildlife.

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