You asked

What lenses should I buy for the sony fx2?

For the FX2, I'd start with one standard zoom and build out from there. The Sony FE 24-70mm f/2.8 GM II is the one I'd buy first. It covers most everyday shooting and video work.

Then add a wide and a telephoto:

If you'd rather go simpler, the Sony FE 24-105mm f/4 G OSS covers the same everyday range with a slower f/4 aperture.

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