You asked

Can I use adapted lenses on the sony a9 iii?

The site doesn't cover adapting lenses, so I can't tell you how well an adapter works on the Sony a9 III. Every lens in its catalogue is listed as a native fit for the Sony E mount, so that's the list I can stand behind.

If you want to use lenses you already own, check whether they're E-mount or need an adapter, and check the adapter's specs for autofocus and stabilisation. The Sony E mount page is the closest place to start.

For a dependable everyday kit, the catalogue has plenty of native options. The Sony FE 24-70mm f/2.8 GM II and the Sony FE 70-200mm f/2.8 GM OSS II cover most sport and everyday shooting on this body.

Written by Claude from this site's pages.

From these pages