Is the canon ef 600mm f 4l is ii usm worth it?

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From Canon EF 600mm f/4L IS II USM: Canon EF 600mm f/4L IS II USM: A prime lens by Canon for Full frame cameras, 600mm f/4. Specs - Maker: Canon - Focal length: 600mm (prime) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: Canon EF - Stabilised: yes - Autofocus: yes What it frames like - On full frame (Canon EF): as marked, 600mm. - On APS-C (Canon) (Canon EF): like 960mm on full frame; f/4 gives about the depth of ...

From Canon EF 600mm f/4L IS III USM: Canon EF 600mm f/4L IS III USM: A prime lens by Canon for Full frame cameras, 600mm f/4.

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