You asked

Best budget lens for the sony a9?

The a9 takes a lot of lenses, so budget is mostly about choosing slower glass. I don't list prices on these pages, so check current listings before you buy.

For a cheap, sensible zoom, I'd look at the Sony FE 28-60mm f/4-5.6 or the Sony FE 28-70mm f/3.5-5.6 OSS. Both are slow, but they cover everyday shooting.

If you want low-light and portrait results, a fast prime gives more for the money. The Sony FE 28mm f/2 is a good place to start.

For the bigger picture on spending, see your first camera. It makes the case for putting money into lenses rather than the body.

Written by Claude from this site's pages.

From these pages